bpo-32159: Remove tools for CVS and Subversion (#4615)

CPython migrated from CVS to Subversion, to Mercurial, and then to
Git. CVS and Subversion are not more used to develop CPython.

* platform module: drop support for sys.subversion. The
  sys.subversion attribute has been removed in Python 3.3.
* Remove Misc/svnmap.txt
* Remove Tools/scripts/svneol.py
* Remove Tools/scripts/treesync.py

Author: vstinner

Lib/platform.py

@@ -1202,9 +1202,6 @@ def _sys_version(sys_version=None):
         _, branch, revision = sys._git
     elif hasattr(sys, '_mercurial'):
         _, branch, revision = sys._mercurial
-    elif hasattr(sys, 'subversion'):
-        # sys.subversion was added in Python 2.5
-        _, branch, revision = sys.subversion
     else:
         branch = ''
         revision = ''
@@ -1259,7 +1256,7 @@ def python_branch():
     """ Returns a string identifying the Python implementation
         branch.
 
-        For CPython this is the Subversion branch from which the
+        For CPython this is the SCM branch from which the
         Python binary was built.
 
         If not available, an empty string is returned.
@@ -1273,7 +1270,7 @@ def python_revision():
     """ Returns a string identifying the Python implementation
         revision.
 
-        For CPython this is the Subversion revision from which the
+        For CPython this is the SCM revision from which the
         Python binary was built.
 
         If not available, an empty string is returned.

Lib/test/test_platform.py

@@ -145,14 +145,14 @@ def test_sys_version(self):
                 ("PyPy", "2.5.2", "trunk", "63378", ('63378', 'Mar 26 2009'),
                  "")
             }
-        for (version_tag, subversion, sys_platform), info in \
+        for (version_tag, scm, sys_platform), info in \
                 sys_versions.items():
             sys.version = version_tag
-            if subversion is None:
+            if scm is None:
                 if hasattr(sys, "_git"):
                     del sys._git
             else:
-                sys._git = subversion
+                sys._git = scm
             if sys_platform is not None:
                 sys.platform = sys_platform
             self.assertEqual(platform.python_implementation(), info[0])

Misc/NEWS.d/next/Tools-Demos/2017-11-28-21-24-41.bpo-32159.RSl4QK.rst

@@ -0,0 +1,3 @@
+Remove CVS and Subversion tools: remove svneol.py and treesync.py scripts.
+CPython migrated from CVS to Subversion, to Mercurial, and then to Git. CVS
+and Subversion are no longer used to develop CPython.

Misc/README

@@ -22,6 +22,5 @@ README.AIX              Information about using Python on AIX
 README.coverity         Information about running Coverity's Prevent on Python
 README.valgrind         Information for Valgrind users, see valgrind-python.supp
 SpecialBuilds.txt       Describes extra symbols you can set for debug builds
-svnmap.txt              Map of old SVN revs and branches to hg changeset ids
 valgrind-python.supp    Valgrind suppression file, see README.valgrind
 vgrindefs               Python configuration for vgrind (a generic pretty printer)

Misc/svnmap.txt

@@ -61,9 +61,7 @@ rgrep.py                  Reverse grep through a file (useful for big logfiles)
 run_tests.py              Run the test suite with more sensible default options
 serve.py                  Small wsgiref-based web server, used in make serve in Doc
 suff.py                   Sort a list of files by suffix
-svneol.py                 Set svn:eol-style on all files in directory
 texi2html.py              Convert GNU texinfo files into HTML
-treesync.py               Synchronize source trees (very idiosyncratic)
 untabify.py               Replace tabs with spaces in argument files
 which.py                  Find a program in $PATH
 win_add2path.py           Add Python to the search path on Windows