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As discussed on python-dev, this patch adds -VV option to python cmdline.
$ ./python -V
Python 3.6.0b2+
$ ./python -VV
Python 3.6.0b2+ (3.6:84a3c5003510+, Oct 26 2016, 02:47:38) 
[GCC 6.2.0 20161005]
The patch includes doc and man update.
Please see, especially my English.

" -V : print the Python version number and exit (also --version)\n\
+ when given twice, print more information about build\n\
+ can be supplied multiple times to show more information\n\"
Why do you indicate "multiple times" because there are only 2 possibilites, -V or -VV, no more.

Since I'm not good English writer, I copied & modified from -v option.
-VVV is same to -VV, similar to -vvv is same to -vv.
-v : verbose (trace import statements); also PYTHONVERBOSE=x
 can be supplied multiple times to increase verbosity

yep, but in this case, just add -VV will add more details about the current revision.
About -VVV or -VV, yes, it's similar because the same C code version >= 2, Py_GetVersion()

I left some review comments. Also (as a native English speaker), I think it is okay to drop the third line about "multiple times". You already say it may be given twice in the line above.

Sorry, I should have said: the other two files (Misc/python.man and Modules/main.c) also need an extra "the", like you changed in Doc/using/cmdline.rst.
Other than that, it looks okay to me. But I guess you could add a quick test case in Lib/test/test_cmd_line.py. There’s already one for single -V and --version.

Oh, it seems I hurried too much.
Thanks to pointing it out.

I noticed today is code freeze for final beta.
Is this too late for 3.6.0?

Ned indicated he was open to the idea: <http://mid.mail-archive.com/nu39u29ドルri1ドル@blaine.gmane.org>. Maybe just double check; there’s still a few hours left!
I’m not sure, but maybe there should be ".. versionchanged:: 3.6" in the RST documentation, and an entry in What’s New?

verbose-version3.patch LGTM and seems useful to me.

New changeset fc6bb69cec05 by INADA Naoki in branch '3.6':
Issue #28532: Show sys.version when -V option is supplied twice
https://hg.python.org/cpython/rev/fc6bb69cec05
New changeset 02aa667bd02d by INADA Naoki in branch 'default':
Issue #28532: Show sys.version when -V option is supplied twice
https://hg.python.org/cpython/rev/02aa667bd02d 

Thanks for review.
Since doc update is allowed after final beta, I committed verbose-version3.patch for now.
Here is patch for doc.

The text looks okay. I’m not sure about putting it in the "Porting to Python 3.6" section, but there doesn’t seem to be a more appropriate existing heading. Perhaps we need a new heading, say "Other Improvement", near "Optimizations" and "Build and C API Changes". A previous What’s New had <https://docs.python.org/3.4/whatsnew/3.4.html#other-improvements>.

Elvis agreed to add "Other Improvements" section. (http://bugs.python.org/issue28635#msg281486)
Here is new patch.

Looks good to me

New changeset 5a29ab5a4785 by INADA Naoki in branch '3.6':
Issue #28532: Add what's new entry for python -VV option
https://hg.python.org/cpython/rev/5a29ab5a4785
New changeset 3f9f13077ca8 by INADA Naoki in branch 'default':
Issue #28532: Add what's new entry for python -VV option
https://hg.python.org/cpython/rev/3f9f13077ca8