* TNTLexer: Don't crash on unexpected EOL

Catch IndexErrors in each line and error the rest of the line,
leaving whatever tokens were found.

* Write and pass tests for Typographic Number Theory

pygments/lexers/tnt.py:
* Fix indentation on import
* Fix: TNTLexer.cur is class-level reference if not initialized
  in get_tokens_unprocessed, so init it in __init__ too
* Fix: Fantasy markers are not allowed as components of other formulas,
  so have a dedicated check for them in the body of get_tokens_unprocessed
  which disables the normal formula handling if present
* Clarify TNTLexer.lineno docstring
* Attempt to discard tokens before an IndexError

+tests/test_tnt.py:
* Test every method, and test both +ve and -ve matches for most
* Lexer fixture is test-level to reinitialize cur clean each time
* Don't test actual get_tokens_unprocessed method (besides for fantasy markers)
  because the text testing is left to examplefiles

AUTHORS:
+ Add myself to credits :)

* Add a TNT test just to make sure no crashes

* Overhaul the MySQL lexer

Fixes #975, #1063, #1453

Changes include:

Documentation
-------------

* Note in the lexer docstring that Oracle MySQL is the target syntax.
  MariaDB syntax is not a target (though there is significant overlap).

Unit tests
----------

* Add 140 unit tests for MySQL.

Literals
--------

* Hexadecimal/binary/date/time/timestamp literals are supported.
* Integer mantissas are supported for scientific notation.
* In-string escapes are now tokenized properly.
* Support the "unknown" constant.

Comments
--------

* Optimizer hints are now supported, and keywords are
  recognized and tokenized as preprocessor instructions.
* Remove nested multi-line comment support, which is no
  longer supported in MySQL.

Variables
---------

* Support the '@' prefix for variable names.
* Lift restrictions on characters in unquoted variable names.
  (MySQL does not impose a restriction on lead characters.)
* Support single/double/backtick-quoted variable names, including escapes.
* Support the '@@' prefix for system variable names.
* Support '?' as a variable so people can demonstrate prepared statements.

Keywords
--------

* Keyword / data type / function are now in a separate, auto-updating file.
* Support 25 additional data types (including spatial and JSON types).
* Support 460 additional MySQL keywords.
* Support 372 MySQL functions.
  Explicit function support resolves a bug that causes non-function
  items to be treated as functions simply because they have a trailing
  opening parenthesis.
* Support exceptions for the 'SET' keyword, which is both a datatype and
  a keyword depending on context.

Schema object names
-------------------

* Support Unicode in MySQL schema object names.
* Support parsing of backtick-quoted schema object name escapes.
  (Escapes do not produce a distinct token type at this time.)

Operators
---------

* Remove non-operator characters from the list of operators.
* Remove non-punctuation characters from the list of punctuation.

* Cleanup items based on feedback

* Remove an unnecessary optional newline lookahead for single-line comments

* add lexer for pointless

* lexer docstring formatting

* added link to languages doc

* update authors

* update version

* added double string

* added upval keyword

* simplify ptls example code

* rename doubleString -> multiString

* Update the Postgres auto-update code

Postgres source code locations and structure have changed a little.
Also, now it works on Windows and sorts all keywords.

* Update the PostgreSQL builtins

Note that LC_COLLATE and LCCTYPE are removed from the keywords list.

* Update AUTHORS

Including tests and an example.promql file.

* Add font and background colors to Style

* Move all styles to get_style_defs, add tests

* Remove hardcoded styles, add special lineno style

* Add styles for special line numbers in tables

* Update noclasses documentation

* Refactor linenos elements and styles, add tests

* Update AUTHORS

* Fix multiple CSS prefixes, add tests