[merge from 3.5] - issue27202 - Fix the mistake in changesets 70af472451cb (3.5) and 2bb806539ca6 (3.6)

exclude_patterns in Sphinx conf.py will exclude the .rsts from the build. It
was incorrect exclude 2.x rsts in that.  This fix contributed again Jelle
Zijlstra, excludes doctests in whatsnew/2.7.rst from being exercised by using
doctests skip option.

exclude_patterns in Sphinx conf.py will exclude the .rsts from the build. It
was incorrect exclude 2.x rsts in that.  This fix contributed again Jelle
Zijlstra, excludes doctests in whatsnew/2.7.rst from being exercised by using
doctests skip option.

Patch by Terry Chia and Laura Rupprecht.

Patch contributed by Jelle Zijlstra.

Patch contributed by Jelle Zijlstra.

Patch contributed by Jelle Zijlstra.

Patch contributed by Jelle Zijlstra.

instead of the generic ProcessTestCase class as they are posix
specific.

  Patch by Xavier de Gaye.

inspect.signature now reports the implicit ``.0`` parameters generated by
the compiler for comprehension and generator expression scopes as if they
were positional-only parameters called ``implicit0``.

Patch by Jelle Zijlstra.

Patch by ingrid, Gregory Loyse and Jelle Zijlstra.

Patch by ingrid, Gregory Loyse and Jelle Zijlstra.

Patch by Xavier de Gaye.

Patch by Xavier de Gaye.