[PEP8] Explicit return a value for functions due to PEP8

Change-Id: Icca789ecb98aa7fbe975dae06d5118db2803381e
---
M pywikibot/i18n.py
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pywikibot/i18n.py b/pywikibot/i18n.py
index 092395a..a82e913 100644
--- a/pywikibot/i18n.py
+++ b/pywikibot/i18n.py
@@ -620,11 +620,11 @@
                 # was True before 65518573d2b0, it did just that. When False it
                 # did just return None. It's now also returning None in the new
                 # iterable mode.
-                return
+                return None
             code = list(xdict.keys())[0]
             trans = xdict[code]
     if trans is None:
-        return  # return None if we have no translation found
+        return None  # return None if we have no translation found
     if parameters is None:
         return trans
 

