[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

source/conf.py

@@ -76,7 +76,7 @@
 #
 # This is also used if you do content translation via gettext catalogs.
 # Usually you set "language" from the command line for these cases.
-language = 'en'
+language = "en"
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.