#15543: glossary entry for and 'universal newlines', and links to it.

Patch by Chris Jerdonek.

13 files changed, 78 insertions, 26 deletions

diff --git a/Doc/glossary.rst b/Doc/glossary.rst
index de6cd89bb4..d0b1922d10 100644
--- a/Doc/glossary.rst
+++ b/Doc/glossary.rst
@@ -630,6 +630,13 @@ Glossary
       object has a type.  An object's type is accessible as its
       :attr:`__class__` attribute or can be retrieved with ``type(obj)``.
 
+   universal newlines
+      A manner of interpreting text streams in which all of the following are
+      recognized as ending a line: the Unix end-of-line convention ``'\n'``,
+      the Windows convention ``'\r\n'``, and the old Macintosh convention
+      ``'\r'``.  See :pep:`278` and :pep:`3116`, as well as
+      :func:`str.splitlines` for an additional use.
+
    view
       The objects returned from :meth:`dict.viewkeys`, :meth:`dict.viewvalues`,
       and :meth:`dict.viewitems` are called dictionary views.  They are lazy
diff --git a/Doc/library/bz2.rst b/Doc/library/bz2.rst
index 79058fbd49..6793c44de9 100644
--- a/Doc/library/bz2.rst
+++ b/Doc/library/bz2.rst
@@ -42,6 +42,9 @@ Here is a summary of the features offered by the bz2 module:
 Handling of compressed files is offered by the :class:`BZ2File` class.
 
 
+.. index::
+   single: universal newlines; bz2.BZ2File class
+
 .. class:: BZ2File(filename[, mode[, buffering[, compresslevel]]])
 
    Open a bz2 file. Mode can be either ``'r'`` or ``'w'``, for reading (default)
@@ -50,7 +53,7 @@ Handling of compressed files is offered by the :class:`BZ2File` class.
    unbuffered, and larger numbers specify the buffer size; the default is
    ``0``. If *compresslevel* is given, it must be a number between ``1`` and
    ``9``; the default is ``9``. Add a ``'U'`` to mode to open the file for input
-   with universal newline support. Any line ending in the input file will be
+   in :term:`universal newlines` mode. Any line ending in the input file will be
    seen as a ``'\n'`` in Python.  Also, a file so opened gains the attribute
    :attr:`newlines`; the value for this attribute is one of ``None`` (no newline
    read yet), ``'\r'``, ``'\n'``, ``'\r\n'`` or a tuple containing all the
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index 30ac614a33..4383cd4e5a 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -859,13 +859,17 @@ available.  They are listed here in alphabetical order.
    binary mode, on systems that differentiate between binary and text files; on
    systems that don't have this distinction, adding the ``'b'`` has no effect.
 
+   .. index::
+      single: universal newlines; open() built-in function
+
    In addition to the standard :c:func:`fopen` values *mode* may be ``'U'`` or
-   ``'rU'``.  Python is usually built with universal newline support; supplying
+   ``'rU'``.  Python is usually built with :term:`universal newlines` support;
+   supplying
    ``'U'`` opens the file as a text file, but lines may be terminated by any of the
    following: the Unix end-of-line convention ``'\n'``,  the Macintosh convention
    ``'\r'``, or the Windows convention ``'\r\n'``. All of these external
    representations are seen as ``'\n'`` by the Python program. If Python is built
-   without universal newline support a *mode* with ``'U'`` is the same as normal
+   without universal newlines support a *mode* with ``'U'`` is the same as normal
    text mode.  Note that file objects so opened also have an attribute called
    :attr:`newlines` which has a value of ``None`` (if no newlines have yet been
    seen), ``'\n'``, ``'\r'``, ``'\r\n'``, or a tuple containing all the newline
diff --git a/Doc/library/io.rst b/Doc/library/io.rst
index e1fa15552f..bb7c34fb48 100644
--- a/Doc/library/io.rst
+++ b/Doc/library/io.rst
@@ -92,7 +92,7 @@ Module Interface
    ``'b'``   binary mode
    ``'t'``   text mode (default)
    ``'+'``   open a disk file for updating (reading and writing)
-   ``'U'``   universal newline mode (for backwards compatibility; should
+   ``'U'``   universal newlines mode (for backwards compatibility; should
              not be used in new code)
    ========= ===============================================================
 
@@ -141,14 +141,18 @@ Module Interface
    used.  Any other error handling name that has been registered with
    :func:`codecs.register_error` is also valid.
 
-   *newline* controls how universal newlines works (it only applies to text
+   .. index::
+      single: universal newlines; open() (in module io)
+
+   *newline* controls how :term:`universal newlines` works (it only applies
+   to text
    mode).  It can be ``None``, ``''``, ``'\n'``, ``'\r'``, and ``'\r\n'``.  It
    works as follows:
 
    * On input, if *newline* is ``None``, universal newlines mode is enabled.
      Lines in the input can end in ``'\n'``, ``'\r'``, or ``'\r\n'``, and these
      are translated into ``'\n'`` before being returned to the caller.  If it is
-     ``''``, universal newline mode is enabled, but line endings are returned to
+     ``''``, universal newlines mode is enabled, but line endings are returned to
      the caller untranslated.  If it has any of the other legal values, input
      lines are only terminated by the given string, and the line ending is
      returned to the caller untranslated.
@@ -754,13 +758,17 @@ Text I/O
    sequences) can be used.  Any other error handling name that has been
    registered with :func:`codecs.register_error` is also valid.
 
+   .. index::
+      single: universal newlines; io.TextIOWrapper class
+
    *newline* controls how line endings are handled.  It can be ``None``,
    ``''``, ``'\n'``, ``'\r'``, and ``'\r\n'``.  It works as follows:
 
-   * On input, if *newline* is ``None``, universal newlines mode is enabled.
+   * On input, if *newline* is ``None``, :term:`universal newlines` mode is
+     enabled.
      Lines in the input can end in ``'\n'``, ``'\r'``, or ``'\r\n'``, and these
      are translated into ``'\n'`` before being returned to the caller.  If it is
-     ``''``, universal newline mode is enabled, but line endings are returned to
+     ``''``, universal newlines mode is enabled, but line endings are returned to
      the caller untranslated.  If it has any of the other legal values, input
      lines are only terminated by the given string, and the line ending is
      returned to the caller untranslated.
@@ -817,10 +825,13 @@ Text I/O
       output.close()
 
 
+.. index::
+   single: universal newlines; io.IncrementalNewlineDecoder class
+
 .. class:: IncrementalNewlineDecoder
 
-   A helper codec that decodes newlines for universal newlines mode.  It
-   inherits :class:`codecs.IncrementalDecoder`.
+   A helper codec that decodes newlines for :term:`universal newlines` mode.
+   It inherits :class:`codecs.IncrementalDecoder`.
 
 
 Advanced topics
diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index abe305250b..4dfed58f83 100644
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -1181,10 +1181,13 @@ string functions based on regular expressions.
    ``'  1  2   3  '.split(None, 1)`` returns ``['1', '2   3  ']``.
 
 
+.. index::
+   single: universal newlines; str.splitlines method
+
 .. method:: str.splitlines([keepends])
 
    Return a list of the lines in the string, breaking at line boundaries.
-   This method uses the universal newlines approach to splitting lines.
+   This method uses the :term:`universal newlines` approach to splitting lines.
    Line breaks are not included in the resulting list unless *keepends* is
    given and true.
 
@@ -2558,16 +2561,19 @@ the particular object.
    form ``<...>``.  This is a read-only attribute and may not be present on all
    file-like objects.
 
+   .. index::
+      single: universal newlines; file.newlines attribute
+
 
 .. attribute:: file.newlines
 
-   If Python was built with universal newlines enabled (the default) this
+   If Python was built with :term:`universal newlines` enabled (the default) this
    read-only attribute exists, and for files opened in universal newline read
    mode it keeps track of the types of newlines encountered while reading the
    file. The values it can take are ``'\r'``, ``'\n'``, ``'\r\n'``, ``None``
    (unknown, no newlines read yet) or a tuple containing all the newline types
    seen, to indicate that multiple newline conventions were encountered. For
-   files not opened in universal newline read mode the value of this attribute
+   files not opened in universal newlines read mode the value of this attribute
    will be ``None``.
 
 
diff --git a/Doc/library/subprocess.rst b/Doc/library/subprocess.rst
index 1f7315922c..9f823235b4 100644
--- a/Doc/library/subprocess.rst
+++ b/Doc/library/subprocess.rst
@@ -220,9 +220,12 @@ default values. The arguments that are most commonly needed are:
    the stderr data from the child process should be captured into the same file
    handle as for stdout.
 
+   .. index::
+      single: universal newlines; subprocess module
+
    When *stdout* or *stderr* are pipes and *universal_newlines* is
-   :const:`True` then all line endings will be converted to ``'\n'`` as
-   described for the universal newlines `'U'`` mode argument to :func:`open`.
+   ``True`` then all line endings will be converted to ``'\n'`` as described
+   for the :term:`universal newlines` `'U'`` mode argument to :func:`open`.
 
    If *shell* is :const:`True`, the specified command will be executed through
    the shell. This can be useful if you are using Python primarily for the
@@ -382,8 +385,9 @@ functions.
 
    .. _side-by-side assembly: http://en.wikipedia.org/wiki/Side-by-Side_Assembly
 
-   If *universal_newlines* is :const:`True`, the file objects stdout and stderr are
-   opened as text files, but lines may be terminated by any of ``'\n'``, the Unix
+   If *universal_newlines* is ``True``, the file objects *stdout* and *stderr* are
+   opened as text files in :term:`universal newlines` mode.  Lines may be
+   terminated by any of ``'\n'``, the Unix
    end-of-line convention, ``'\r'``, the old Macintosh convention or ``'\r\n'``, the
    Windows convention. All of these external representations are seen as ``'\n'``
    by the Python program.
diff --git a/Doc/library/urllib.rst b/Doc/library/urllib.rst
index 2d52f95275..1cb3faf412 100644
--- a/Doc/library/urllib.rst
+++ b/Doc/library/urllib.rst
@@ -34,7 +34,7 @@ High-level interface
 
    Open a network object denoted by a URL for reading.  If the URL does not have a
    scheme identifier, or if it has :file:`file:` as its scheme identifier, this
-   opens a local file (without universal newlines); otherwise it opens a socket to
+   opens a local file (without :term:`universal newlines`); otherwise it opens a socket to
    a server somewhere on the network.  If the connection cannot be made the
    :exc:`IOError` exception is raised.  If all went well, a file-like object is
    returned.  This supports the following methods: :meth:`read`, :meth:`readline`,
diff --git a/Doc/library/zipfile.rst b/Doc/library/zipfile.rst
index 68e8dfac4e..77a1eecf12 100644
--- a/Doc/library/zipfile.rst
+++ b/Doc/library/zipfile.rst
@@ -163,13 +163,17 @@ ZipFile Objects
 
    Return a list of archive members by name.
 
+   .. index::
+      single: universal newlines; zipfile.ZipFile.open method
+
 
 .. method:: ZipFile.open(name[, mode[, pwd]])
 
    Extract a member from the archive as a file-like object (ZipExtFile). *name* is
    the name of the file in the archive, or a :class:`ZipInfo` object. The *mode*
-   parameter, if included, must be one of the following: ``'r'`` (the  default),
-   ``'U'``, or ``'rU'``. Choosing ``'U'`` or  ``'rU'`` will enable universal newline
+   parameter, if included, must be one of the following: ``'r'`` (the default),
+   ``'U'``, or ``'rU'``. Choosing ``'U'`` or  ``'rU'`` will enable
+   :term:`universal newline <universal newlines>`
    support in the read-only object. *pwd* is the password used for encrypted files.
    Calling  :meth:`open` on a closed ZipFile will raise a  :exc:`RuntimeError`.
 
diff --git a/Doc/reference/simple_stmts.rst b/Doc/reference/simple_stmts.rst
index ce22b67188..a9766a4b95 100644
--- a/Doc/reference/simple_stmts.rst
+++ b/Doc/reference/simple_stmts.rst
@@ -1024,5 +1024,5 @@ which may be useful to pass around for use by :keyword:`exec`.
 .. rubric:: Footnotes
 
 .. [#] Note that the parser only accepts the Unix-style end of line convention.
-       If you are reading the code from a file, make sure to use universal
-       newline mode to convert Windows or Mac-style newlines.
+       If you are reading the code from a file, make sure to use
+       :term:`universal newlines` mode to convert Windows or Mac-style newlines.
diff --git a/Doc/whatsnew/2.3.rst b/Doc/whatsnew/2.3.rst
index b034eb2a1f..fbde6e5456 100644
--- a/Doc/whatsnew/2.3.rst
+++ b/Doc/whatsnew/2.3.rst
@@ -366,6 +366,9 @@ Under MacOS, :func:`os.listdir` may now return Unicode filenames.
 .. ======================================================================
 
 
+.. index::
+   single: universal newlines; What's new
+
 PEP 278: Universal Newline Support
 ==================================
 
@@ -378,7 +381,8 @@ two-character sequence of a carriage return plus a newline.
 
 Python's file objects can now support end of line conventions other than the one
 followed by the platform on which Python is running. Opening a file with the
-mode ``'U'`` or ``'rU'`` will open a file for reading in universal newline mode.
+mode ``'U'`` or ``'rU'`` will open a file for reading in
+:term:`universal newlines` mode.
 All three line ending conventions will be translated to a ``'\n'`` in the
 strings returned by the various file methods such as :meth:`read` and
 :meth:`readline`.
diff --git a/Doc/whatsnew/2.4.rst b/Doc/whatsnew/2.4.rst
index 97a02938bd..e9677ac14b 100644
--- a/Doc/whatsnew/2.4.rst
+++ b/Doc/whatsnew/2.4.rst
@@ -411,6 +411,9 @@ error streams will be.  You can provide a file object or a file descriptor, or
 you can use the constant ``subprocess.PIPE`` to create a pipe between the
 subprocess and the parent.
 
+.. index::
+   single: universal newlines; What's new
+
 The constructor has a number of handy options:
 
 * *close_fds* requests that all file descriptors be closed before running the
@@ -424,7 +427,7 @@ The constructor has a number of handy options:
 * *preexec_fn* is a function that gets called before the child is started.
 
 * *universal_newlines* opens the child's input and output using Python's
-  universal newline feature.
+  :term:`universal newlines` feature.
 
 Once you've created the :class:`Popen` instance,  you can call its :meth:`wait`
 method to pause until the subprocess has exited, :meth:`poll` to check if it's
diff --git a/Doc/whatsnew/2.5.rst b/Doc/whatsnew/2.5.rst
index ff599c8d8a..503302449f 100644
--- a/Doc/whatsnew/2.5.rst
+++ b/Doc/whatsnew/2.5.rst
@@ -1338,9 +1338,12 @@ complete list of changes, or look through the SVN logs for all the details.
 
   .. XXX need to provide some more detail here
 
+  .. index::
+     single: universal newlines; What's new
+
 * The :mod:`fileinput` module was made more flexible. Unicode filenames are now
   supported, and a *mode* parameter that defaults to ``"r"`` was added to the
-  :func:`input` function to allow opening files in binary or universal-newline
+  :func:`input` function to allow opening files in binary or :term:`universal newlines`
   mode.  Another new parameter, *openhook*, lets you use a function other than
   :func:`open`  to open the input files.  Once you're iterating over  the set of
   files, the :class:`FileInput` object's new :meth:`fileno` returns the file
diff --git a/Doc/whatsnew/2.6.rst b/Doc/whatsnew/2.6.rst
index 796963a17b..c9336cb2f4 100644
--- a/Doc/whatsnew/2.6.rst
+++ b/Doc/whatsnew/2.6.rst
@@ -1067,9 +1067,12 @@ the :mod:`io` module:
   The :class:`BytesIO` class supports reading, writing, and seeking
   over an in-memory buffer.
 
+  .. index::
+     single: universal newlines; What's new
+
 * :class:`TextIOBase`: Provides functions for reading and writing
   strings (remember, strings will be Unicode in Python 3.0),
-  and supporting universal newlines.  :class:`TextIOBase` defines
+  and supporting :term:`universal newlines`.  :class:`TextIOBase` defines
   the :meth:`readline` method and supports iteration upon
   objects.