source importlib.

unittest.TestCase in prep of running tests under frozen and source
importlib.

retry on EINTR).

of OPT for special build options.  By setting OPT, some compiler-specific
options like -fwrapv were overridden and thus not used, which could result
in broken interpreters when building with clang.

64-bit/32-bit installer for 10.6+.  It is no longer necessary
to install a third-party version of Tcl/Tk 8.5 to work around the
problems in the Apple-supplied Tcl/Tk 8.5 shipped in OS X 10.6
and later releases.

when building _tkinter.  configure has two new options; if used, both must
be specified:

  ./configure \
      --with-tcltk-includes="-I/opt/local/include" \
      --with-tcltk-libs="-L/opt/local/lib -ltcl8.5 -ltk8.5"

In addition, the options can be overridden with make:

   make \
       TCLTK_INCLUDES="-I/opt/local/include" \
       TCLTK_LIBS="-L/opt/local/lib -ltcl8.6 -ltk8.6"

argument.  Original patch by Arfrever Frehtes Taifersar Arahesis.

argument.  Original patch by Arfrever Frehtes Taifersar Arahesis.

argument.  Original patch by Arfrever Frehtes Taifersar Arahesis.

argument.  Original patch by Arfrever Frehtes Taifersar Arahesis.

Close #19379: Lazily import linecache in the warnings module, to make startup with warnings faster until a warning gets printed.

functions.

Issue #19352: Fix unittest discovery when a module can be reached through several paths (e.g. under Debian/Ubuntu with virtualenv).

Issue #19352: Fix unittest discovery when a module can be reached through several paths (e.g. under Debian/Ubuntu with virtualenv).

Patch by Sunny K.

Patch by Sunny K.

Issue #15207: Fix mimetypes to read from correct area in Windows registry (Original patch by Dave Chambers)