parse command line arguments.

parse command line arguments.

parse command line arguments.

This changes the main documentation, doc strings, source code comments, and a
couple error messages in the test suite. In some cases the word was removed
or edited some other way to fix the grammar.

Issue #25316: distutils raises OSError instead of DistutilsPlatformError when MSVC is not installed.

Issue #25316: distutils raises OSError instead of DistutilsPlatformError when MSVC is not installed.

Patch by TAKASE Arihiro.

Issue #25027: Reverts partial-static build options and adds vcruntime140.dll to Windows installation.

This ensures that wheels will work when moved to machines that have the same subset of the MSVC libraries as a regular CPython install. Specifically, vcruntime##0.dll may not be installed, and should not be a dependency.

Patch from Alexander Belopolsky.

Patch by Martin Panter.

The concept of .pyo files no longer exists. Now .pyc files have an
optional `opt-` tag which specifies if any extra optimizations beyond
the peepholer were applied.