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

Change-Id: Ic28c634cf806394cfa82b61cb45be60b8f40a61a
diff --git a/tox.ini b/tox.ini
index 9279455..f9d04f2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,20 +12,20 @@
    {env:BASHATE_INSTALL_PATH:bashate==0.3.2}
 whitelist_externals = bash
 commands = bash -c "find {toxinidir}             \
-         -not \( -type d -name .?\* -prune \)    \ # prune all 'dot' dirs
-         -not \( -type d -name doc -prune \)     \ # skip documentation
-         -not \( -type d -name shocco -prune \)  \ # skip shocco
-         -type f                                 \ # only files
-         -not -name \*~                          \ # skip editors, readme, etc
+         -not \( -type d -name .?\* -prune \)    \
+         -not \( -type d -name doc -prune \)     \
+         -not \( -type d -name shocco -prune \)  \
+         -type f                                 \
+         -not -name \*~                          \
          -not -name \*.md                        \
          \(                                      \
           -name \*.sh -or                        \
           -name \*.orig -or                      \
-          -name \*rc -or                         \ # openrc files, etc
+          -name \*rc -or                         \
           -name functions\* -or                  \
-          -wholename \*/inc/\* -or               \ # /inc files and
-          -wholename \*/lib/\*                   \ # /lib files are shell, but
-         \)                                      \ #   have no extension
+          -wholename \*/inc/\* -or               \
+          -wholename \*/lib/\*                   \
+         \)                                      \
          -print0 | xargs -0 bashate -v -iE006 -eE005,E042"
 
 [testenv:docs]