Casting Py_ssize_t to Py_ssize_t is useless.

Issue #27278: Fix os.urandom() implementation using getrandom() on Linux.
Truncate size to INT_MAX and loop until we collected enough random bytes,
instead of casting a directly Py_ssize_t to int.

Initial patch by Alex LordThorsen.

They are not used as base classes by another tests so they
can safely be removed.

sqlite3.OptimizedUnicode is an alias for str in Python 3 and
its behavior is already tested in CheckOptimizedUnicode in
Lib/sqlite3/test/factory.py.

sqlite3.OptimizedUnicode was undocumented in 0fc10a33eb4c and
probably added back with the result of a bad merge.

containing spaces.

containing spaces.

   _sysconfigdata module too.

  one set by the env var PAGER).

  plat-$(PLATFORM_TRIPLET).
  Rename the config directory (LIBPL) from config-$(LDVERSION) to
  config-$(LDVERSION)-$(PLATFORM_TRIPLET).
  Install the platform specifc _sysconfigdata module into the platform
  directory and rename it to include the ABIFLAGS.

  one set by the env var PAGER).

Previously, when IDLE was started from a console or by import, a cascade
of warnings was emitted.  Patch by Serhiy Storchaka.