Do not fail with Tox 2.3.1

Latest tox causes failures:
   File "/usr/local/lib/python2.7/dist-packages/tox/config.py", line 1140, in processcommand
     argv = list(shlexer)
   File "/usr/lib/python2.7/shlex.py", line 269, in next
     token = self.get_token()
   File "/usr/lib/python2.7/shlex.py", line 96, in get_token
     raw = self.read_token()
   File "/usr/lib/python2.7/shlex.py", line 172, in read_token
     raise ValueError, "No closing quotation"
 ValueError: No closing quotation

This is caused by a backwards incompatible change in tox:
https://bitbucket.org/hpk42/tox/issues/181

We need to work with both older and newer tox versions, so let's remove
the comment at the end of the line

Change-Id: Id5ec8aeb700fcf9a63888e41e408d26b6e3e8481

tox.ini

@@ -30,9 +30,9 @@ commands = flake8
 deps = bashate
 whitelist_externals = bash
 commands = bash -c "find {toxinidir}          \
-         -not \( -type d -name .?\* -prune \) \ # prune all 'dot' dirs
-         -type f                              \ # only files
-         -not -name \*~                       \ # skip editors, readme, etc
+         -not \( -type d -name .?\* -prune \) \
+         -type f                              \
+         -not -name \*~                       \
          -not -name \*.md                     \
          -name \*.sh                          \
          -print0 | xargs -0 bashate -v"