Fix language setting in docs

diff --git a/docs/conf.py b/docs/conf.py
index 84be26539a0eed8f6239a75cdf4b9dd120f4ec41..0b0b04f87b2b6d7002044709c93ba677760c136f 100755 (executable)
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -64,7 +64,7 @@ release = "1.0.0"
 #
 # This is also used if you do content translation via gettext catalogs.
 # Usually you set "language" from the command line for these cases.
-language = None
+language = "en"
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.