doc: Enable pep8 on doc generation code

As pep8 does not run on doc generation python code so we have some
style violations there. As it not too hard to fix the problems and
therefore enable pep8 on these files this patch proposes such a
change.

Change-Id: I26104ea66fc4f3e67f8227025f43202e483beb25

2 files changed, 7 insertions, 6 deletions

diff --git a/doc/ext/support_matrix.py b/doc/ext/support_matrix.py
index f99ff78cd5..96e0b379e9 100644
--- a/doc/ext/support_matrix.py
+++ b/doc/ext/support_matrix.py
@@ -25,7 +25,6 @@ It is used via a single directive in the .rst file
 import re
 import sys
 
-import six
 from six.moves import configparser
 
 from docutils import nodes
@@ -59,7 +58,9 @@ class SupportMatrixFeature(object):
                   STATUS_CONDITION, STATUS_OPTIONAL]
 
     def __init__(self, key, title, status=STATUS_OPTIONAL,
-                 group=None, notes=None, cli=[]):
+                 group=None, notes=None, cli=None):
+        if not cli:
+            cli = []
         # A unique key (eg 'foo.bar.wizz') to identify the feature
         self.key = key
         # A human friendly short title for the feature
@@ -474,10 +475,10 @@ class SupportMatrixDirective(rst.Directive):
             notes.append(item)
 
     def _create_cli_paragraph(self, feature):
-        ''' Create a paragraph which represents the CLI commands of the feature
+        """Create a paragraph which represents the CLI commands of the feature
 
         The paragraph will have a bullet list of CLI commands.
-        '''
+        """
         para = nodes.paragraph()
         para.append(nodes.strong(text="CLI commands:"))
         commands = nodes.bullet_list()
@@ -489,7 +490,7 @@ class SupportMatrixDirective(rst.Directive):
         return para
 
     def _create_notes_paragraph(self, notes):
-        """ Constructs a paragraph which represents the implementation notes
+        """Constructs a paragraph which represents the implementation notes
 
         The paragraph consists of text and clickable URL nodes if links were
         given in the notes.
diff --git a/doc/ext/versioned_notifications.py b/doc/ext/versioned_notifications.py
index da0b2f82bf..64b3babba9 100644
--- a/doc/ext/versioned_notifications.py
+++ b/doc/ext/versioned_notifications.py
@@ -22,8 +22,8 @@ It is used via a single directive in the .rst file
 
 from docutils import nodes
 import importlib
-from sphinx.util.compat import Directive
 import pkgutil
+from sphinx.util.compat import Directive
 
 import nova.notifications.objects
 from nova.notifications.objects import base as notification