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diff --git a/pygments/lexers/dsls.py b/pygments/lexers/dsls.py
deleted file mode 100644
index eb338d79..00000000
--- a/pygments/lexers/dsls.py
+++ /dev/null
@@ -1,878 +0,0 @@
-# -*- coding: utf-8 -*-
-"""
-    pygments.lexers.dsls
-    ~~~~~~~~~~~~~~~~~~~~
-
-    Lexers for various domain-specific languages.
-
-    :copyright: Copyright 2006-2019 by the Pygments team, see AUTHORS.
-    :license: BSD, see LICENSE for details.
-"""
-
-import re
-
-from pygments.lexer import ExtendedRegexLexer, RegexLexer, bygroups, words, \
-    include, default, this, using, combined
-from pygments.token import Text, Comment, Operator, Keyword, Name, String, \
-    Number, Punctuation, Literal, Whitespace
-
-__all__ = ['ProtoBufLexer', 'BroLexer', 'PuppetLexer', 'RslLexer',
-           'MscgenLexer', 'VGLLexer', 'AlloyLexer', 'PanLexer',
-           'CrmshLexer', 'ThriftLexer', 'FlatlineLexer', 'SnowballLexer']
-
-
-class ProtoBufLexer(RegexLexer):
-    """
-    Lexer for `Protocol Buffer <http://code.google.com/p/protobuf/>`_
-    definition files.
-
-    .. versionadded:: 1.4
-    """
-
-    name = 'Protocol Buffer'
-    aliases = ['protobuf', 'proto']
-    filenames = ['*.proto']
-
-    tokens = {
-        'root': [
-            (r'[ \t]+', Text),
-            (r'[,;{}\[\]()<>]', Punctuation),
-            (r'/(\\\n)?/(\n|(.|\n)*?[^\\]\n)', Comment.Single),
-            (r'/(\\\n)?\*(.|\n)*?\*(\\\n)?/', Comment.Multiline),
-            (words((
-                'import', 'option', 'optional', 'required', 'repeated',
-                'reserved', 'default', 'packed', 'ctype', 'extensions', 'to',
-                'max', 'rpc', 'returns', 'oneof'), prefix=r'\b', suffix=r'\b'),
-             Keyword),
-            (words((
-                'int32', 'int64', 'uint32', 'uint64', 'sint32', 'sint64',
-                'fixed32', 'fixed64', 'sfixed32', 'sfixed64',
-                'float', 'double', 'bool', 'string', 'bytes'), suffix=r'\b'),
-             Keyword.Type),
-            (r'(true|false)\b', Keyword.Constant),
-            (r'(package)(\s+)', bygroups(Keyword.Namespace, Text), 'package'),
-            (r'(message|extend)(\s+)',
-             bygroups(Keyword.Declaration, Text), 'message'),
-            (r'(enum|group|service)(\s+)',
-             bygroups(Keyword.Declaration, Text), 'type'),
-            (r'\".*?\"', String),
-            (r'\'.*?\'', String),
-            (r'(\d+\.\d*|\.\d+|\d+)[eE][+-]?\d+[LlUu]*', Number.Float),
-            (r'(\d+\.\d*|\.\d+|\d+[fF])[fF]?', Number.Float),
-            (r'(\-?(inf|nan))\b', Number.Float),
-            (r'0x[0-9a-fA-F]+[LlUu]*', Number.Hex),
-            (r'0[0-7]+[LlUu]*', Number.Oct),
-            (r'\d+[LlUu]*', Number.Integer),
-            (r'[+-=]', Operator),
-            (r'([a-zA-Z_][\w.]*)([ \t]*)(=)',
-             bygroups(Name.Attribute, Text, Operator)),
-            (r'[a-zA-Z_][\w.]*', Name),
-        ],
-        'package': [
-            (r'[a-zA-Z_]\w*', Name.Namespace, '#pop'),
-            default('#pop'),
-        ],
-        'message': [
-            (r'[a-zA-Z_]\w*', Name.Class, '#pop'),
-            default('#pop'),
-        ],
-        'type': [
-            (r'[a-zA-Z_]\w*', Name, '#pop'),
-            default('#pop'),
-        ],
-    }
-
-
-class ThriftLexer(RegexLexer):
-    """
-    For `Thrift <https://thrift.apache.org/>`__ interface definitions.
-
-    .. versionadded:: 2.1
-    """
-    name = 'Thrift'
-    aliases = ['thrift']
-    filenames = ['*.thrift']
-    mimetypes = ['application/x-thrift']
-
-    tokens = {
-        'root': [
-            include('whitespace'),
-            include('comments'),
-            (r'"', String.Double, combined('stringescape', 'dqs')),
-            (r'\'', String.Single, combined('stringescape', 'sqs')),
-            (r'(namespace)(\s+)',
-                bygroups(Keyword.Namespace, Text.Whitespace), 'namespace'),
-            (r'(enum|union|struct|service|exception)(\s+)',
-                bygroups(Keyword.Declaration, Text.Whitespace), 'class'),
-            (r'((?:(?:[^\W\d]|\$)[\w.\[\]$<>]*\s+)+?)'  # return arguments
-             r'((?:[^\W\d]|\$)[\w$]*)'                  # method name
-             r'(\s*)(\()',                              # signature start
-             bygroups(using(this), Name.Function, Text, Operator)),
-            include('keywords'),
-            include('numbers'),
-            (r'[&=]', Operator),
-            (r'[:;,{}()<>\[\]]', Punctuation),
-            (r'[a-zA-Z_](\.\w|\w)*', Name),
-        ],
-        'whitespace': [
-            (r'\n', Text.Whitespace),
-            (r'\s+', Text.Whitespace),
-        ],
-        'comments': [
-            (r'#.*$', Comment),
-            (r'//.*?\n', Comment),
-            (r'/\*[\w\W]*?\*/', Comment.Multiline),
-        ],
-        'stringescape': [
-            (r'\\([\\nrt"\'])', String.Escape),
-        ],
-        'dqs': [
-            (r'"', String.Double, '#pop'),
-            (r'[^\\"\n]+', String.Double),
-        ],
-        'sqs': [
-            (r"'", String.Single, '#pop'),
-            (r'[^\\\'\n]+', String.Single),
-        ],
-        'namespace': [
-            (r'[a-z*](\.\w|\w)*', Name.Namespace, '#pop'),
-            default('#pop'),
-        ],
-        'class': [
-            (r'[a-zA-Z_]\w*', Name.Class, '#pop'),
-            default('#pop'),
-        ],
-        'keywords': [
-            (r'(async|oneway|extends|throws|required|optional)\b', Keyword),
-            (r'(true|false)\b', Keyword.Constant),
-            (r'(const|typedef)\b', Keyword.Declaration),
-            (words((
-                'cpp_namespace', 'cpp_include', 'cpp_type', 'java_package',
-                'cocoa_prefix', 'csharp_namespace', 'delphi_namespace',
-                'php_namespace', 'py_module', 'perl_package',
-                'ruby_namespace', 'smalltalk_category', 'smalltalk_prefix',
-                'xsd_all', 'xsd_optional', 'xsd_nillable', 'xsd_namespace',
-                'xsd_attrs', 'include'), suffix=r'\b'),
-             Keyword.Namespace),
-            (words((
-                'void', 'bool', 'byte', 'i16', 'i32', 'i64', 'double',
-                'string', 'binary', 'map', 'list', 'set', 'slist',
-                'senum'), suffix=r'\b'),
-             Keyword.Type),
-            (words((
-                'BEGIN', 'END', '__CLASS__', '__DIR__', '__FILE__',
-                '__FUNCTION__', '__LINE__', '__METHOD__', '__NAMESPACE__',
-                'abstract', 'alias', 'and', 'args', 'as', 'assert', 'begin',
-                'break', 'case', 'catch', 'class', 'clone', 'continue',
-                'declare', 'def', 'default', 'del', 'delete', 'do', 'dynamic',
-                'elif', 'else', 'elseif', 'elsif', 'end', 'enddeclare',
-                'endfor', 'endforeach', 'endif', 'endswitch', 'endwhile',
-                'ensure', 'except', 'exec', 'finally', 'float', 'for',
-                'foreach', 'function', 'global', 'goto', 'if', 'implements',
-                'import', 'in', 'inline', 'instanceof', 'interface', 'is',
-                'lambda', 'module', 'native', 'new', 'next', 'nil', 'not',
-                'or', 'pass', 'public', 'print', 'private', 'protected',
-                'raise', 'redo', 'rescue', 'retry', 'register', 'return',
-                'self', 'sizeof', 'static', 'super', 'switch', 'synchronized',
-                'then', 'this', 'throw', 'transient', 'try', 'undef',
-                'unless', 'unsigned', 'until', 'use', 'var', 'virtual',
-                'volatile', 'when', 'while', 'with', 'xor', 'yield'),
-                prefix=r'\b', suffix=r'\b'),
-             Keyword.Reserved),
-        ],
-        'numbers': [
-            (r'[+-]?(\d+\.\d+([eE][+-]?\d+)?|\.?\d+[eE][+-]?\d+)', Number.Float),
-            (r'[+-]?0x[0-9A-Fa-f]+', Number.Hex),
-            (r'[+-]?[0-9]+', Number.Integer),
-        ],
-    }
-
-
-class BroLexer(RegexLexer):
-    """
-    For `Bro <http://bro-ids.org/>`_ scripts.
-
-    .. versionadded:: 1.5
-    """
-    name = 'Bro'
-    aliases = ['bro']
-    filenames = ['*.bro']
-
-    _hex = r'[0-9a-fA-F_]'
-    _float = r'((\d*\.?\d+)|(\d+\.?\d*))([eE][-+]?\d+)?'
-    _h = r'[A-Za-z0-9][-A-Za-z0-9]*'
-
-    tokens = {
-        'root': [
-            # Whitespace
-            (r'^@.*?\n', Comment.Preproc),
-            (r'#.*?\n', Comment.Single),
-            (r'\n', Text),
-            (r'\s+', Text),
-            (r'\\\n', Text),
-            # Keywords
-            (r'(add|alarm|break|case|const|continue|delete|do|else|enum|event'
-             r'|export|for|function|if|global|hook|local|module|next'
-             r'|of|print|redef|return|schedule|switch|type|when|while)\b', Keyword),
-            (r'(addr|any|bool|count|counter|double|file|int|interval|net'
-             r'|pattern|port|record|set|string|subnet|table|time|timer'
-             r'|vector)\b', Keyword.Type),
-            (r'(T|F)\b', Keyword.Constant),
-            (r'(&)((?:add|delete|expire)_func|attr|(?:create|read|write)_expire'
-             r'|default|disable_print_hook|raw_output|encrypt|group|log'
-             r'|mergeable|optional|persistent|priority|redef'
-             r'|rotate_(?:interval|size)|synchronized)\b',
-             bygroups(Punctuation, Keyword)),
-            (r'\s+module\b', Keyword.Namespace),
-            # Addresses, ports and networks
-            (r'\d+/(tcp|udp|icmp|unknown)\b', Number),
-            (r'(\d+\.){3}\d+', Number),
-            (r'(' + _hex + r'){7}' + _hex, Number),
-            (r'0x' + _hex + r'(' + _hex + r'|:)*::(' + _hex + r'|:)*', Number),
-            (r'((\d+|:)(' + _hex + r'|:)*)?::(' + _hex + r'|:)*', Number),
-            (r'(\d+\.\d+\.|(\d+\.){2}\d+)', Number),
-            # Hostnames
-            (_h + r'(\.' + _h + r')+', String),
-            # Numeric
-            (_float + r'\s+(day|hr|min|sec|msec|usec)s?\b', Literal.Date),
-            (r'0[xX]' + _hex, Number.Hex),
-            (_float, Number.Float),
-            (r'\d+', Number.Integer),
-            (r'/', String.Regex, 'regex'),
-            (r'"', String, 'string'),
-            # Operators
-            (r'[!%*/+:<=>?~|-]', Operator),
-            (r'([-+=&|]{2}|[+=!><-]=)', Operator),
-            (r'(in|match)\b', Operator.Word),
-            (r'[{}()\[\]$.,;]', Punctuation),
-            # Identfier
-            (r'([_a-zA-Z]\w*)(::)', bygroups(Name, Name.Namespace)),
-            (r'[a-zA-Z_]\w*', Name)
-        ],
-        'string': [
-            (r'"', String, '#pop'),
-            (r'\\([\\abfnrtv"\']|x[a-fA-F0-9]{2,4}|[0-7]{1,3})', String.Escape),
-            (r'[^\\"\n]+', String),
-            (r'\\\n', String),
-            (r'\\', String)
-        ],
-        'regex': [
-            (r'/', String.Regex, '#pop'),
-            (r'\\[\\nt/]', String.Regex),  # String.Escape is too intense here.
-            (r'[^\\/\n]+', String.Regex),
-            (r'\\\n', String.Regex),
-            (r'\\', String.Regex)
-        ]
-    }
-
-
-class PuppetLexer(RegexLexer):
-    """
-    For `Puppet <http://puppetlabs.com/>`__ configuration DSL.
-
-    .. versionadded:: 1.6
-    """
-    name = 'Puppet'
-    aliases = ['puppet']
-    filenames = ['*.pp']
-
-    tokens = {
-        'root': [
-            include('comments'),
-            include('keywords'),
-            include('names'),
-            include('numbers'),
-            include('operators'),
-            include('strings'),
-
-            (r'[]{}:(),;[]', Punctuation),
-            (r'[^\S\n]+', Text),
-        ],
-
-        'comments': [
-            (r'\s*#.*$', Comment),
-            (r'/(\\\n)?[*](.|\n)*?[*](\\\n)?/', Comment.Multiline),
-        ],
-
-        'operators': [
-            (r'(=>|\?|<|>|=|\+|-|/|\*|~|!|\|)', Operator),
-            (r'(in|and|or|not)\b', Operator.Word),
-        ],
-
-        'names': [
-            (r'[a-zA-Z_]\w*', Name.Attribute),
-            (r'(\$\S+)(\[)(\S+)(\])', bygroups(Name.Variable, Punctuation,
-                                               String, Punctuation)),
-            (r'\$\S+', Name.Variable),
-        ],
-
-        'numbers': [
-            # Copypasta from the Python lexer
-            (r'(\d+\.\d*|\d*\.\d+)([eE][+-]?[0-9]+)?j?', Number.Float),
-            (r'\d+[eE][+-]?[0-9]+j?', Number.Float),
-            (r'0[0-7]+j?', Number.Oct),
-            (r'0[xX][a-fA-F0-9]+', Number.Hex),
-            (r'\d+L', Number.Integer.Long),
-            (r'\d+j?', Number.Integer)
-        ],
-
-        'keywords': [
-            # Left out 'group' and 'require'
-            # Since they're often used as attributes
-            (words((
-                'absent', 'alert', 'alias', 'audit', 'augeas', 'before', 'case',
-                'check', 'class', 'computer', 'configured', 'contained',
-                'create_resources', 'crit', 'cron', 'debug', 'default',
-                'define', 'defined', 'directory', 'else', 'elsif', 'emerg',
-                'err', 'exec', 'extlookup', 'fail', 'false', 'file',
-                'filebucket', 'fqdn_rand', 'generate', 'host', 'if', 'import',
-                'include', 'info', 'inherits', 'inline_template', 'installed',
-                'interface', 'k5login', 'latest', 'link', 'loglevel',
-                'macauthorization', 'mailalias', 'maillist', 'mcx', 'md5',
-                'mount', 'mounted', 'nagios_command', 'nagios_contact',
-                'nagios_contactgroup', 'nagios_host', 'nagios_hostdependency',
-                'nagios_hostescalation', 'nagios_hostextinfo', 'nagios_hostgroup',
-                'nagios_service', 'nagios_servicedependency', 'nagios_serviceescalation',
-                'nagios_serviceextinfo', 'nagios_servicegroup', 'nagios_timeperiod',
-                'node', 'noop', 'notice', 'notify', 'package', 'present', 'purged',
-                'realize', 'regsubst', 'resources', 'role', 'router', 'running',
-                'schedule', 'scheduled_task', 'search', 'selboolean', 'selmodule',
-                'service', 'sha1', 'shellquote', 'split', 'sprintf',
-                'ssh_authorized_key', 'sshkey', 'stage', 'stopped', 'subscribe',
-                'tag', 'tagged', 'template', 'tidy', 'true', 'undef', 'unmounted',
-                'user', 'versioncmp', 'vlan', 'warning', 'yumrepo', 'zfs', 'zone',
-                'zpool'), prefix='(?i)', suffix=r'\b'),
-             Keyword),
-        ],
-
-        'strings': [
-            (r'"([^"])*"', String),
-            (r"'(\\'|[^'])*'", String),
-        ],
-
-    }
-
-
-class RslLexer(RegexLexer):
-    """
-    `RSL <http://en.wikipedia.org/wiki/RAISE>`_ is the formal specification
-    language used in RAISE (Rigorous Approach to Industrial Software Engineering)
-    method.
-
-    .. versionadded:: 2.0
-    """
-    name = 'RSL'
-    aliases = ['rsl']
-    filenames = ['*.rsl']
-    mimetypes = ['text/rsl']
-
-    flags = re.MULTILINE | re.DOTALL
-
-    tokens = {
-        'root': [
-            (words((
-                'Bool', 'Char', 'Int', 'Nat', 'Real', 'Text', 'Unit', 'abs',
-                'all', 'always', 'any', 'as', 'axiom', 'card', 'case', 'channel',
-                'chaos', 'class', 'devt_relation', 'dom', 'elems', 'else', 'elif',
-                'end', 'exists', 'extend', 'false', 'for', 'hd', 'hide', 'if',
-                'in', 'is', 'inds', 'initialise', 'int', 'inter', 'isin', 'len',
-                'let', 'local', 'ltl_assertion', 'object', 'of', 'out', 'post',
-                'pre', 'read', 'real', 'rng', 'scheme', 'skip', 'stop', 'swap',
-                'then', 'theory', 'test_case', 'tl', 'transition_system', 'true',
-                'type', 'union', 'until', 'use', 'value', 'variable', 'while',
-                'with', 'write', '~isin', '-inflist', '-infset', '-list',
-                '-set'), prefix=r'\b', suffix=r'\b'),
-             Keyword),
-            (r'(variable|value)\b', Keyword.Declaration),
-            (r'--.*?\n', Comment),
-            (r'<:.*?:>', Comment),
-            (r'\{!.*?!\}', Comment),
-            (r'/\*.*?\*/', Comment),
-            (r'^[ \t]*([\w]+)[ \t]*:[^:]', Name.Function),
-            (r'(^[ \t]*)([\w]+)([ \t]*\([\w\s,]*\)[ \t]*)(is|as)',
-             bygroups(Text, Name.Function, Text, Keyword)),
-            (r'\b[A-Z]\w*\b', Keyword.Type),
-            (r'(true|false)\b', Keyword.Constant),
-            (r'".*"', String),
-            (r'\'.\'', String.Char),
-            (r'(><|->|-m->|/\\|<=|<<=|<\.|\|\||\|\^\||-~->|-~m->|\\/|>=|>>|'
-             r'\.>|\+\+|-\\|<->|=>|:-|~=|\*\*|<<|>>=|\+>|!!|\|=\||#)',
-             Operator),
-            (r'[0-9]+\.[0-9]+([eE][0-9]+)?[fd]?', Number.Float),
-            (r'0x[0-9a-f]+', Number.Hex),
-            (r'[0-9]+', Number.Integer),
-            (r'.', Text),
-        ],
-    }
-
-    def analyse_text(text):
-        """
-        Check for the most common text in the beginning of a RSL file.
-        """
-        if re.search(r'scheme\s*.*?=\s*class\s*type', text, re.I) is not None:
-            return 1.0
-
-
-class MscgenLexer(RegexLexer):
-    """
-    For `Mscgen <http://www.mcternan.me.uk/mscgen/>`_ files.
-
-    .. versionadded:: 1.6
-    """
-    name = 'Mscgen'
-    aliases = ['mscgen', 'msc']
-    filenames = ['*.msc']
-
-    _var = r'(\w+|"(?:\\"|[^"])*")'
-
-    tokens = {
-        'root': [
-            (r'msc\b', Keyword.Type),
-            # Options
-            (r'(hscale|HSCALE|width|WIDTH|wordwraparcs|WORDWRAPARCS'
-             r'|arcgradient|ARCGRADIENT)\b', Name.Property),
-            # Operators
-            (r'(abox|ABOX|rbox|RBOX|box|BOX|note|NOTE)\b', Operator.Word),
-            (r'(\.|-|\|){3}', Keyword),
-            (r'(?:-|=|\.|:){2}'
-             r'|<<=>>|<->|<=>|<<>>|<:>'
-             r'|->|=>>|>>|=>|:>|-x|-X'
-             r'|<-|<<=|<<|<=|<:|x-|X-|=', Operator),
-            # Names
-            (r'\*', Name.Builtin),
-            (_var, Name.Variable),
-            # Other
-            (r'\[', Punctuation, 'attrs'),
-            (r'\{|\}|,|;', Punctuation),
-            include('comments')
-        ],
-        'attrs': [
-            (r'\]', Punctuation, '#pop'),
-            (_var + r'(\s*)(=)(\s*)' + _var,
-             bygroups(Name.Attribute, Text.Whitespace, Operator, Text.Whitespace,
-                      String)),
-            (r',', Punctuation),
-            include('comments')
-        ],
-        'comments': [
-            (r'(?://|#).*?\n', Comment.Single),
-            (r'/\*(?:.|\n)*?\*/', Comment.Multiline),
-            (r'[ \t\r\n]+', Text.Whitespace)
-        ]
-    }
-
-
-class VGLLexer(RegexLexer):
-    """
-    For `SampleManager VGL <http://www.thermoscientific.com/samplemanager>`_
-    source code.
-
-    .. versionadded:: 1.6
-    """
-    name = 'VGL'
-    aliases = ['vgl']
-    filenames = ['*.rpf']
-
-    flags = re.MULTILINE | re.DOTALL | re.IGNORECASE
-
-    tokens = {
-        'root': [
-            (r'\{[^}]*\}', Comment.Multiline),
-            (r'declare', Keyword.Constant),
-            (r'(if|then|else|endif|while|do|endwhile|and|or|prompt|object'
-             r'|create|on|line|with|global|routine|value|endroutine|constant'
-             r'|global|set|join|library|compile_option|file|exists|create|copy'
-             r'|delete|enable|windows|name|notprotected)(?! *[=<>.,()])',
-             Keyword),
-            (r'(true|false|null|empty|error|locked)', Keyword.Constant),
-            (r'[~^*#!%&\[\]()<>|+=:;,./?-]', Operator),
-            (r'"[^"]*"', String),
-            (r'(\.)([a-z_$][\w$]*)', bygroups(Operator, Name.Attribute)),
-            (r'[0-9][0-9]*(\.[0-9]+(e[+\-]?[0-9]+)?)?', Number),
-            (r'[a-z_$][\w$]*', Name),
-            (r'[\r\n]+', Text),
-            (r'\s+', Text)
-        ]
-    }
-
-
-class AlloyLexer(RegexLexer):
-    """
-    For `Alloy <http://alloy.mit.edu>`_ source code.
-
-    .. versionadded:: 2.0
-    """
-
-    name = 'Alloy'
-    aliases = ['alloy']
-    filenames = ['*.als']
-    mimetypes = ['text/x-alloy']
-
-    flags = re.MULTILINE | re.DOTALL
-
-    iden_rex = r'[a-zA-Z_][\w\']*'
-    text_tuple = (r'[^\S\n]+', Text)
-
-    tokens = {
-        'sig': [
-            (r'(extends)\b', Keyword, '#pop'),
-            (iden_rex, Name),
-            text_tuple,
-            (r',', Punctuation),
-            (r'\{', Operator, '#pop'),
-        ],
-        'module': [
-            text_tuple,
-            (iden_rex, Name, '#pop'),
-        ],
-        'fun': [
-            text_tuple,
-            (r'\{', Operator, '#pop'),
-            (iden_rex, Name, '#pop'),
-        ],
-        'root': [
-            (r'--.*?$', Comment.Single),
-            (r'//.*?$', Comment.Single),
-            (r'/\*.*?\*/', Comment.Multiline),
-            text_tuple,
-            (r'(module|open)(\s+)', bygroups(Keyword.Namespace, Text),
-                'module'),
-            (r'(sig|enum)(\s+)', bygroups(Keyword.Declaration, Text), 'sig'),
-            (r'(iden|univ|none)\b', Keyword.Constant),
-            (r'(int|Int)\b', Keyword.Type),
-            (r'(this|abstract|extends|set|seq|one|lone|let)\b', Keyword),
-            (r'(all|some|no|sum|disj|when|else)\b', Keyword),
-            (r'(run|check|for|but|exactly|expect|as)\b', Keyword),
-            (r'(and|or|implies|iff|in)\b', Operator.Word),
-            (r'(fun|pred|fact|assert)(\s+)', bygroups(Keyword, Text), 'fun'),
-            (r'!|#|&&|\+\+|<<|>>|>=|<=>|<=|\.|->', Operator),
-            (r'[-+/*%=<>&!^|~{}\[\]().]', Operator),
-            (iden_rex, Name),
-            (r'[:,]', Punctuation),
-            (r'[0-9]+', Number.Integer),
-            (r'"(\\\\|\\"|[^"])*"', String),
-            (r'\n', Text),
-        ]
-    }
-
-
-class PanLexer(RegexLexer):
-    """
-    Lexer for `pan <http://github.com/quattor/pan/>`_ source files.
-
-    Based on tcsh lexer.
-
-    .. versionadded:: 2.0
-    """
-
-    name = 'Pan'
-    aliases = ['pan']
-    filenames = ['*.pan']
-
-    tokens = {
-        'root': [
-            include('basic'),
-            (r'\(', Keyword, 'paren'),
-            (r'\{', Keyword, 'curly'),
-            include('data'),
-        ],
-        'basic': [
-            (words((
-                'if', 'for', 'with', 'else', 'type', 'bind', 'while', 'valid', 'final',
-                'prefix', 'unique', 'object', 'foreach', 'include', 'template',
-                'function', 'variable', 'structure', 'extensible', 'declaration'),
-                prefix=r'\b', suffix=r'\s*\b'),
-             Keyword),
-            (words((
-                'file_contents', 'format', 'index', 'length', 'match', 'matches',
-                'replace', 'splice', 'split', 'substr', 'to_lowercase', 'to_uppercase',
-                'debug', 'error', 'traceback', 'deprecated', 'base64_decode',
-                'base64_encode', 'digest', 'escape', 'unescape', 'append', 'create',
-                'first', 'nlist', 'key', 'list', 'merge', 'next', 'prepend', 'is_boolean',
-                'is_defined', 'is_double', 'is_list', 'is_long', 'is_nlist', 'is_null',
-                'is_number', 'is_property', 'is_resource', 'is_string', 'to_boolean',
-                'to_double', 'to_long', 'to_string', 'clone', 'delete', 'exists',
-                'path_exists', 'if_exists', 'return', 'value'),
-                prefix=r'\b', suffix=r'\s*\b'),
-             Name.Builtin),
-            (r'#.*', Comment),
-            (r'\\[\w\W]', String.Escape),
-            (r'(\b\w+)(\s*)(=)', bygroups(Name.Variable, Text, Operator)),
-            (r'[\[\]{}()=]+', Operator),
-            (r'<<\s*(\'?)\\?(\w+)[\w\W]+?\2', String),
-            (r';', Punctuation),
-        ],
-        'data': [
-            (r'(?s)"(\\\\|\\[0-7]+|\\.|[^"\\])*"', String.Double),
-            (r"(?s)'(\\\\|\\[0-7]+|\\.|[^'\\])*'", String.Single),
-            (r'\s+', Text),
-            (r'[^=\s\[\]{}()$"\'`\\;#]+', Text),
-            (r'\d+(?= |\Z)', Number),
-        ],
-        'curly': [
-            (r'\}', Keyword, '#pop'),
-            (r':-', Keyword),
-            (r'\w+', Name.Variable),
-            (r'[^}:"\'`$]+', Punctuation),
-            (r':', Punctuation),
-            include('root'),
-        ],
-        'paren': [
-            (r'\)', Keyword, '#pop'),
-            include('root'),
-        ],
-    }
-
-
-class CrmshLexer(RegexLexer):
-    """
-    Lexer for `crmsh <http://crmsh.github.io/>`_ configuration files
-    for Pacemaker clusters.
-
-    .. versionadded:: 2.1
-    """
-    name = 'Crmsh'
-    aliases = ['crmsh', 'pcmk']
-    filenames = ['*.crmsh', '*.pcmk']
-    mimetypes = []
-
-    elem = words((
-        'node', 'primitive', 'group', 'clone', 'ms', 'location',
-        'colocation', 'order', 'fencing_topology', 'rsc_ticket',
-        'rsc_template', 'property', 'rsc_defaults',
-        'op_defaults', 'acl_target', 'acl_group', 'user', 'role',
-        'tag'), suffix=r'(?![\w#$-])')
-    sub = words((
-        'params', 'meta', 'operations', 'op', 'rule',
-        'attributes', 'utilization'), suffix=r'(?![\w#$-])')
-    acl = words(('read', 'write', 'deny'), suffix=r'(?![\w#$-])')
-    bin_rel = words(('and', 'or'), suffix=r'(?![\w#$-])')
-    un_ops = words(('defined', 'not_defined'), suffix=r'(?![\w#$-])')
-    date_exp = words(('in_range', 'date', 'spec', 'in'), suffix=r'(?![\w#$-])')
-    acl_mod = (r'(?:tag|ref|reference|attribute|type|xpath)')
-    bin_ops = (r'(?:lt|gt|lte|gte|eq|ne)')
-    val_qual = (r'(?:string|version|number)')
-    rsc_role_action = (r'(?:Master|Started|Slave|Stopped|'
-                       r'start|promote|demote|stop)')
-
-    tokens = {
-        'root': [
-            (r'^#.*\n?', Comment),
-            # attr=value (nvpair)
-            (r'([\w#$-]+)(=)("(?:""|[^"])*"|\S+)',
-                bygroups(Name.Attribute, Punctuation, String)),
-            # need this construct, otherwise numeric node ids
-            # are matched as scores
-            # elem id:
-            (r'(node)(\s+)([\w#$-]+)(:)',
-                bygroups(Keyword, Whitespace, Name, Punctuation)),
-            # scores
-            (r'([+-]?([0-9]+|inf)):', Number),
-            # keywords (elements and other)
-            (elem, Keyword),
-            (sub, Keyword),
-            (acl, Keyword),
-            # binary operators
-            (r'(?:%s:)?(%s)(?![\w#$-])' % (val_qual, bin_ops), Operator.Word),
-            # other operators
-            (bin_rel, Operator.Word),
-            (un_ops, Operator.Word),
-            (date_exp, Operator.Word),
-            # builtin attributes (e.g. #uname)
-            (r'#[a-z]+(?![\w#$-])', Name.Builtin),
-            # acl_mod:blah
-            (r'(%s)(:)("(?:""|[^"])*"|\S+)' % acl_mod,
-             bygroups(Keyword, Punctuation, Name)),
-            # rsc_id[:(role|action)]
-            # NB: this matches all other identifiers
-            (r'([\w#$-]+)(?:(:)(%s))?(?![\w#$-])' % rsc_role_action,
-             bygroups(Name, Punctuation, Operator.Word)),
-            # punctuation
-            (r'(\\(?=\n)|[\[\](){}/:@])', Punctuation),
-            (r'\s+|\n', Whitespace),
-        ],
-    }
-
-
-class FlatlineLexer(RegexLexer):
-    """
-    Lexer for `Flatline <https://github.com/bigmlcom/flatline>`_ expressions.
-
-    .. versionadded:: 2.2
-    """
-    name = 'Flatline'
-    aliases = ['flatline']
-    filenames = []
-    mimetypes = ['text/x-flatline']
-
-    special_forms = ('let',)
-
-    builtins = (
-        "!=", "*", "+", "-", "<", "<=", "=", ">", ">=", "abs", "acos", "all",
-        "all-but", "all-with-defaults", "all-with-numeric-default", "and",
-        "asin", "atan", "avg", "avg-window", "bin-center", "bin-count", "call",
-        "category-count", "ceil", "cond", "cond-window", "cons", "cos", "cosh",
-        "count", "diff-window", "div", "ensure-value", "ensure-weighted-value",
-        "epoch", "epoch-day", "epoch-fields", "epoch-hour", "epoch-millisecond",
-        "epoch-minute", "epoch-month", "epoch-second", "epoch-weekday",
-        "epoch-year", "exp", "f", "field", "field-prop", "fields", "filter",
-        "first", "floor", "head", "if", "in", "integer", "language", "length",
-        "levenshtein", "linear-regression", "list", "ln", "log", "log10", "map",
-        "matches", "matches?", "max", "maximum", "md5", "mean", "median", "min",
-        "minimum", "missing", "missing-count", "missing?", "missing_count",
-        "mod", "mode", "normalize", "not", "nth", "occurrences", "or",
-        "percentile", "percentile-label", "population", "population-fraction",
-        "pow", "preferred", "preferred?", "quantile-label", "rand", "rand-int",
-        "random-value", "re-quote", "real", "replace", "replace-first", "rest",
-        "round", "row-number", "segment-label", "sha1", "sha256", "sin", "sinh",
-        "sqrt", "square", "standard-deviation", "standard_deviation", "str",
-        "subs", "sum", "sum-squares", "sum-window", "sum_squares", "summary",
-        "summary-no", "summary-str", "tail", "tan", "tanh", "to-degrees",
-        "to-radians", "variance", "vectorize", "weighted-random-value", "window",
-        "winnow", "within-percentiles?", "z-score",
-    )
-
-    valid_name = r'(?!#)[\w!$%*+<=>?/.#-]+'
-
-    tokens = {
-        'root': [
-            # whitespaces - usually not relevant
-            (r'[,\s]+', Text),
-
-            # numbers
-            (r'-?\d+\.\d+', Number.Float),
-            (r'-?\d+', Number.Integer),
-            (r'0x-?[a-f\d]+', Number.Hex),
-
-            # strings, symbols and characters
-            (r'"(\\\\|\\"|[^"])*"', String),
-            (r"\\(.|[a-z]+)", String.Char),
-
-            # expression template placeholder
-            (r'_', String.Symbol),
-
-            # highlight the special forms
-            (words(special_forms, suffix=' '), Keyword),
-
-            # highlight the builtins
-            (words(builtins, suffix=' '), Name.Builtin),
-
-            # the remaining functions
-            (r'(?<=\()' + valid_name, Name.Function),
-
-            # find the remaining variables
-            (valid_name, Name.Variable),
-
-            # parentheses
-            (r'(\(|\))', Punctuation),
-        ],
-    }
-
-
-class SnowballLexer(ExtendedRegexLexer):
-    """
-    Lexer for `Snowball <http://snowballstem.org/>`_ source code.
-
-    .. versionadded:: 2.2
-    """
-
-    name = 'Snowball'
-    aliases = ['snowball']
-    filenames = ['*.sbl']
-
-    _ws = r'\n\r\t '
-
-    def __init__(self, **options):
-        self._reset_stringescapes()
-        ExtendedRegexLexer.__init__(self, **options)
-
-    def _reset_stringescapes(self):
-        self._start = "'"
-        self._end = "'"
-
-    def _string(do_string_first):
-        def callback(lexer, match, ctx):
-            s = match.start()
-            text = match.group()
-            string = re.compile(r'([^%s]*)(.)' % re.escape(lexer._start)).match
-            escape = re.compile(r'([^%s]*)(.)' % re.escape(lexer._end)).match
-            pos = 0
-            do_string = do_string_first
-            while pos < len(text):
-                if do_string:
-                    match = string(text, pos)
-                    yield s + match.start(1), String.Single, match.group(1)
-                    if match.group(2) == "'":
-                        yield s + match.start(2), String.Single, match.group(2)
-                        ctx.stack.pop()
-                        break
-                    yield s + match.start(2), String.Escape, match.group(2)
-                    pos = match.end()
-                match = escape(text, pos)
-                yield s + match.start(), String.Escape, match.group()
-                if match.group(2) != lexer._end:
-                    ctx.stack[-1] = 'escape'
-                    break
-                pos = match.end()
-                do_string = True
-            ctx.pos = s + match.end()
-        return callback
-
-    def _stringescapes(lexer, match, ctx):
-        lexer._start = match.group(3)
-        lexer._end = match.group(5)
-        return bygroups(Keyword.Reserved, Text, String.Escape, Text,
-                        String.Escape)(lexer, match, ctx)
-
-    tokens = {
-        'root': [
-            (words(('len', 'lenof'), suffix=r'\b'), Operator.Word),
-            include('root1'),
-        ],
-        'root1': [
-            (r'[%s]+' % _ws, Text),
-            (r'\d+', Number.Integer),
-            (r"'", String.Single, 'string'),
-            (r'[()]', Punctuation),
-            (r'/\*[\w\W]*?\*/', Comment.Multiline),
-            (r'//.*', Comment.Single),
-            (r'[!*+\-/<=>]=|[-=]>|<[+-]|[$*+\-/<=>?\[\]]', Operator),
-            (words(('as', 'get', 'hex', 'among', 'define', 'decimal',
-                    'backwardmode'), suffix=r'\b'),
-             Keyword.Reserved),
-            (words(('strings', 'booleans', 'integers', 'routines', 'externals',
-                    'groupings'), suffix=r'\b'),
-             Keyword.Reserved, 'declaration'),
-            (words(('do', 'or', 'and', 'for', 'hop', 'non', 'not', 'set', 'try',
-                    'fail', 'goto', 'loop', 'next', 'test', 'true',
-                    'false', 'unset', 'atmark', 'attach', 'delete', 'gopast',
-                    'insert', 'repeat', 'sizeof', 'tomark', 'atleast',
-                    'atlimit', 'reverse', 'setmark', 'tolimit', 'setlimit',
-                    'backwards', 'substring'), suffix=r'\b'),
-             Operator.Word),
-            (words(('size', 'limit', 'cursor', 'maxint', 'minint'),
-                   suffix=r'\b'),
-             Name.Builtin),
-            (r'(stringdef\b)([%s]*)([^%s]+)' % (_ws, _ws),
-             bygroups(Keyword.Reserved, Text, String.Escape)),
-            (r'(stringescapes\b)([%s]*)(.)([%s]*)(.)' % (_ws, _ws),
-             _stringescapes),
-            (r'[A-Za-z]\w*', Name),
-        ],
-        'declaration': [
-            (r'\)', Punctuation, '#pop'),
-            (words(('len', 'lenof'), suffix=r'\b'), Name,
-             ('root1', 'declaration')),
-            include('root1'),
-        ],
-        'string': [
-            (r"[^']*'", _string(True)),
-        ],
-        'escape': [
-            (r"[^']*'", _string(False)),
-        ],
-    }
-
-    def get_tokens_unprocessed(self, text=None, context=None):
-        self._reset_stringescapes()
-        return ExtendedRegexLexer.get_tokens_unprocessed(self, text, context)