Merge "Fixing the deprecated library function."
diff --git a/doc/source/conf.py b/doc/source/conf.py
index 12d1d40..7e4503d 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -127,8 +127,11 @@
# If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
# using the given strftime format.
-git_cmd = "git log --pretty=format:'%ad, commit %h' --date=local -n1"
-html_last_updated_fmt = os.popen(git_cmd).read()
+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]
# If true, SmartyPants will be used to convert quotes and dashes to
# typographically correct entities.