Fixes some redirection links in docs.

* Implement math.remainder.

* Fix markup for arguments; use double spaces after period.

* Mark up function reference in what's new entry.

* Add comment explaining the calculation in the final branch.

* Fix out-of-order entry in whatsnew.

* Add comment explaining why it's good enough to compare m with c, in spite of possible rounding error.

Patch by Lisa Roach. See also PEP 628.

Reformat header above separator line (added if missing) to a common format.
Patch by Yoni Lavi.

Closes #25910: fix dead and permanently redirected links in the docs. Thanks to SilentGhost for the patch.

For details, see:
PEP 0485 -- A Function for testing approximate equality

Functions added: math.isclose() and cmath.isclose().

Original code by Chris Barker. Patch by Tal Einat.

deprecated.  Based on patch by Mark Dickinson.

#15438: add a note to math.pow() that suggests using **/pow() for integers.  Patch by Mark Dickinson.

#15438: add a note to math.pow() that suggests using **/pow() for integers.  Patch by Mark Dickinson.

Dickinson.

svn+ssh://pythondev@svn.python.org/python/trunk

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  r82429 | benjamin.peterson | 2010-07-01 18:35:37 -0500 (Thu, 01 Jul 2010) | 1 line

  trunc does use the special method, though
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svn+ssh://pythondev@svn.python.org/python/trunk

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  r82415 | benjamin.peterson | 2010-07-01 10:07:15 -0500 (Thu, 01 Jul 2010) | 1 line

  remove docs about delegating to special methods; it does no such thing
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svn+ssh://pythondev@svn.python.org/python/trunk

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  r79875 | mark.dickinson | 2010-04-06 23:18:23 +0100 (Tue, 06 Apr 2010) | 1 line

  More NaN consistency doc fixes.
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Merged revisions 79307,79408,79430,79533,79542,79579-79580,79585-79587,79607-79608,79622,79717,79820,79822,79828,79862,79875,79923-79924,79941-79943,79945,79947,79951-79952 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk

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  r79307 | florent.xicluna | 2010-03-22 17:45:50 -0500 (Mon, 22 Mar 2010) | 2 lines

  #7667: Fix doctest failures with non-ASCII paths.
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  r79408 | victor.stinner | 2010-03-24 20:18:38 -0500 (Wed, 24 Mar 2010) | 2 lines

  Fix a gcc warning introduced by r79397.
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  r79430 | brian.curtin | 2010-03-25 18:48:54 -0500 (Thu, 25 Mar 2010) | 2 lines

  Fix #6538. Markup RegexObject and MatchObject as classes. Patch by Ryan Arana.
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  r79533 | barry.warsaw | 2010-03-31 16:07:16 -0500 (Wed, 31 Mar 2010) | 6 lines

  - Issue #8233: When run as a script, py_compile.py optionally takes a single
    argument `-` which tells it to read files to compile from stdin.  Each line
    is read on demand and the named file is compiled immediately.  (Original
    patch by Piotr O?\197?\188arowski).
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  r79542 | r.david.murray | 2010-03-31 20:28:39 -0500 (Wed, 31 Mar 2010) | 3 lines

  A couple small grammar fixes in test.rst, and rewrite the
  check_warnings docs to be clearer.
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  r79579 | georg.brandl | 2010-04-02 03:34:41 -0500 (Fri, 02 Apr 2010) | 1 line

  Add 2.6.5.
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  r79580 | georg.brandl | 2010-04-02 03:39:09 -0500 (Fri, 02 Apr 2010) | 1 line

  #2768: add a note on how to get a file descriptor.
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  r79585 | georg.brandl | 2010-04-02 04:03:18 -0500 (Fri, 02 Apr 2010) | 1 line

  Remove col-spanning cells in logging docs.
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  r79586 | georg.brandl | 2010-04-02 04:07:42 -0500 (Fri, 02 Apr 2010) | 1 line

  Document PyImport_ExecCodeModuleEx().
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  r79587 | georg.brandl | 2010-04-02 04:11:49 -0500 (Fri, 02 Apr 2010) | 1 line

  #8012: clarification in generator glossary entry.
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  r79607 | andrew.kuchling | 2010-04-02 12:48:23 -0500 (Fri, 02 Apr 2010) | 1 line

  #6647: document that catch_warnings is not thread-safe
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  r79608 | andrew.kuchling | 2010-04-02 12:54:26 -0500 (Fri, 02 Apr 2010) | 1 line

  #6647: add note to two examples
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  r79622 | tarek.ziade | 2010-04-02 16:34:19 -0500 (Fri, 02 Apr 2010) | 1 line

  removed documentation on code that was reverted and pushed into distutils2
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  r79717 | antoine.pitrou | 2010-04-03 16:22:38 -0500 (Sat, 03 Apr 2010) | 4 lines

  Fix wording / typography, and a slightly misleading statement
  (memoryviews don't support complex structures right now)
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  r79820 | benjamin.peterson | 2010-04-05 22:34:09 -0500 (Mon, 05 Apr 2010) | 1 line

  ready _sre types
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  r79822 | georg.brandl | 2010-04-06 03:18:15 -0500 (Tue, 06 Apr 2010) | 1 line

  #8320: document return value of recv_into().
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  r79828 | georg.brandl | 2010-04-06 09:33:44 -0500 (Tue, 06 Apr 2010) | 1 line

  Add JP.
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  r79862 | georg.brandl | 2010-04-06 15:27:59 -0500 (Tue, 06 Apr 2010) | 1 line

  Fix syntax.
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  r79875 | mark.dickinson | 2010-04-06 17:18:23 -0500 (Tue, 06 Apr 2010) | 1 line

  More NaN consistency doc fixes.
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  r79923 | georg.brandl | 2010-04-10 06:15:24 -0500 (Sat, 10 Apr 2010) | 1 line

  #8360: skipTest was added in 2.7.
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  r79924 | georg.brandl | 2010-04-10 06:16:59 -0500 (Sat, 10 Apr 2010) | 1 line

  #8346: update version.
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  r79941 | andrew.kuchling | 2010-04-10 20:39:36 -0500 (Sat, 10 Apr 2010) | 1 line

  Two grammar fixes
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  r79942 | andrew.kuchling | 2010-04-10 20:40:06 -0500 (Sat, 10 Apr 2010) | 1 line

  Punctuation fix
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  r79943 | andrew.kuchling | 2010-04-10 20:40:30 -0500 (Sat, 10 Apr 2010) | 1 line

  Add various items
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  r79945 | andrew.kuchling | 2010-04-10 20:40:49 -0500 (Sat, 10 Apr 2010) | 1 line

  name correct
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  r79947 | andrew.kuchling | 2010-04-10 20:44:13 -0500 (Sat, 10 Apr 2010) | 1 line

  Remove distutils section
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  r79951 | andrew.kuchling | 2010-04-11 07:48:08 -0500 (Sun, 11 Apr 2010) | 1 line

  Two typo fixes
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  r79952 | andrew.kuchling | 2010-04-11 07:49:37 -0500 (Sun, 11 Apr 2010) | 1 line

  Add two items
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