The "FAQ" link at the end was changed to a Wikipedia link; reflect that.
Closes #17725: small grammar fix.
Closes #15213: update comment for _PyOS_URandom
Closes #11807: document argparse add_subparsers method better.

Patch by Filip Gruszczyński.
Closes #15432: GzipFile mtime argument was added in 2.7.
Fix typo in function name.
Fix: win32_ver returns a 4-tuple. Found by Andrew Berg on docs@.
Fix typo in example file name. Found by John Bokma on docs@.
Use the platform-independent way of calling a script from the shell: "python prog.py", not "prog.py"

Found by Micheal Wells on docs@.