Update hacking for Python3

The repo is Python 3 now, so update hacking to version 3.0 which
supports Python 3.

Fix problems found by updated hacking version.

Change-Id: I881f5d020d0ea95afb0eab6828928bc386afc263

bin/docstheme-lang-display-name.py

@@ -22,7 +22,7 @@ import babel
 
 lang_code = sys.argv[1]
 try:
-    l = babel.Locale.parse(lang_code)
-    print(l.get_display_name())
+    lo = babel.Locale.parse(lang_code)
+    print(lo.get_display_name())
 except Exception:
     print(lang_code)

openstackdocstheme/ext.py

@@ -312,8 +312,8 @@ def _builder_inited(app):
         'figure_align': 'H',
         'classoptions': ',openany',
         'preamble': r"""
-\usepackage{""" + pdf_theme_path + """}
-\\newcommand{\openstacklogo}{""" + theme_logo + """}
+\usepackage{""" + pdf_theme_path + r"""}
+\newcommand{\openstacklogo}{""" + theme_logo + """}
 """}
 
 

openstackdocstheme/page_context.py

@@ -48,7 +48,7 @@ def _get_last_updated_file(src_file):
             try:
                 return datetime.datetime.strptime(last_updated_t,
                                                   '%Y-%m-%d %H:%M:%S')
-            except ValueError as err:
+            except ValueError:
                 LOG.info(
                     '[openstackdocstheme] '
                     'Could not parse modification time of %s: %r',

test-requirements.txt

@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-hacking>=1.1.0,<1.2.0 # Apache-2.0
+hacking>=3.0,<3.1.0 # Apache-2.0
 
 # this is required for the docs build jobs
 sphinx!=1.6.6,!=1.6.7,>=1.6.2 # BSD

tox.ini

@@ -83,6 +83,6 @@ deps = bindep
 commands = bindep test
 
 [flake8]
-exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,tools
+exclude=.venv,.git,.tox,dist,doc,api-ref,*lib/python*,*egg,tools
 show-source = True
 enable-extensions = H203,H106