Enable hacking rule E265

E265 is block comment should start with '# '

Closes-Bug: #1391787

Change-Id: I8f0e142bd14fd201da3b8c39501f9d858a5b051b

ironic/common/utils.py

@@ -409,7 +409,7 @@ def mkfs(fs, path, label=None):
         args = ['mkswap']
     else:
         args = ['mkfs', '-t', fs]
-    #add -F to force no interactive execute on non-block device.
+    # add -F to force no interactive execute on non-block device.
     if fs in ('ext3', 'ext4'):
         args.extend(['-F'])
     if label:

tox.ini

@@ -46,8 +46,7 @@ commands = {posargs}
 
 [flake8]
 # E711: ignored because it is normal to use "column == None" in sqlalchemy
-# TODO(yuriyz): Analyze or fix the warnings blacklisted below
-ignore = E12,E265,E711
+ignore = E12,E711
 exclude =  .venv,.git,.tox,dist,doc,*openstack/common*,*lib/python*,*egg,build,tools,*ironic/nova*
 max-complexity=17