Fixes comments to pass E265 check.

Fixes comments to pass E265 check.
Removes E265 from ignore setting in tox.ini.

Change-Id: I2e83c037a920a06b24695d6daea70ded179e3ebe

oslo/db/sqlalchemy/migration_cli/ext_base.py

@@ -18,7 +18,7 @@ import six
 @six.add_metaclass(abc.ABCMeta)
 class MigrationExtensionBase(object):
 
-    #used to sort migration in logical order
+    # used to sort migration in logical order
     order = 0
 
     @property

oslo/db/sqlalchemy/migration_cli/ext_migrate.py

@@ -49,7 +49,7 @@ class MigrateExtension(ext_base.MigrationExtensionBase):
 
     def downgrade(self, version):
         try:
-            #version for migrate should be valid int - else skip
+            # version for migrate should be valid int - else skip
             if version in ('base', None):
                 version = self.init_version
             version = int(version)

oslo/db/sqlalchemy/migration_cli/manager.py

@@ -46,7 +46,7 @@ class MigrationManager(object):
 
     def downgrade(self, revision):
         """Downgrade database with available backends."""
-        #downgrading should be performed in reversed order
+        # downgrading should be performed in reversed order
         results = []
         for plugin in reversed(self._plugins):
             results.append(plugin.downgrade(revision))
@@ -63,7 +63,7 @@ class MigrationManager(object):
 
     def revision(self, message, autogenerate):
         """Generate template or autogenerated revision."""
-        #revision should be done only by last plugin
+        # revision should be done only by last plugin
         return self._plugins[-1].revision(message, autogenerate)
 
     def stamp(self, revision):

tox.ini

@@ -45,7 +45,7 @@ commands =
 # see https://bugs.launchpad.net/hacking/+bug/1329363
 
 show-source = True
-ignore = E123,E125,E265,H305,H307,H803,H904
+ignore = E123,E125,H305,H307,H803,H904
 builtins = _
 exclude=.venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build