doc: Fix broken build

Seems the gate wasn't running with 'warning-is-error' switched on.

Change-Id: Ib4498ff16ba82321fb568e3a97c8bb4d5060bec6
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>

README.rst

@@ -89,7 +89,7 @@ The intention is that this driver follows the OpenStack Nova model.
 
 The driver is being promoted into the nova core project in stages, the first of
 which is represented by blueprint `powervm-nova-compute-driver`_.  The
-coexistence of these two incarnations of the driver raises some `Dual Driver
+coexistence of these two incarnations of the driver raises some `Upgrade
 Considerations`_.
 
 .. _`powervm-nova-compute-driver`: https://blueprints.launchpad.net/nova/+spec/powervm-nova-compute-driver

doc/ext/support_matrix.py

@@ -320,7 +320,7 @@ class SupportMatrixDirective(rst.Directive):
 
         # then one column for each hypervisor driver
         impls = matrix.targets.keys()
-        impls.sort()
+        sorted(impls)
         for key in impls:
             target = matrix.targets[key]
             implcol = nodes.entry()
@@ -353,7 +353,7 @@ class SupportMatrixDirective(rst.Directive):
 
             # and then one column for each hypervisor driver
             impls = matrix.targets.keys()
-            impls.sort()
+            sorted(impls)
             for key in impls:
                 target = matrix.targets[key]
                 impl = feature.implementations[key]

doc/source/conf.py

@@ -11,9 +11,8 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-import subprocess
-import sys
 import os
+import sys
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
@@ -143,11 +142,7 @@ pygments_style = 'sphinx'
 
 # If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
 # using the given strftime format.
-#html_last_updated_fmt = '%b %d, %Y'
-git_cmd = ["git", "log", "--pretty=format:'%ad, commit %h'", "--date=local",
-          "-n1"]
-html_last_updated_fmt = subprocess.Popen(
-    git_cmd, stdout=subprocess.PIPE).communicate()[0]
+html_last_updated_fmt = '%Y-%m-%d %H:%M'
 
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.