Optimize the test for issue #13454.
Now it requires almost 4x less memory and is almost 2x faster.
Issue #10156: In the interpreter's initialization phase, unicode globals
are now initialized dynamically as needed.
Adapt test for build --without-doc-strings.
fix typo; thanks to Dmitry Northerner from docs@
Issue #14018: fix merge error
Issue #13886: Fix input() to not strip out supposedly-invalid input bytes.
Issue #11729: Backport commit bff052d9 from libffi upstream in order to fix
a ctypes build failure with clang.
- Issue #17041: Fix testing when Python is configured with the
  --without-doc-strings option.
Remove trailing whitespaces in cStringIO.h.
Fix skip conditions in some docstings tests.
Issue #17051: Fix a memory leak in os.path.isdir() on Windows. Patch by Robert Xiao.
Add Robert Xiao to Misc/ACKS for issue17051.
fix long fixer docs (#4590)
Issue #14018: Backport OS X installer updates from 3.3.
Issue #16979: Fix error handling bugs in the unicode-escape-decode decoder.
Merge heads
Clean up escape-decode decoder tests.
Add tests for raw-unicode-escape codec.
Move NEWS entity from library to core section.
Added clarification to logging HOWTO.