[bugfix] Do not create an option named None

Bug: T366409
Change-Id: I3f37b5f220daecc45a6ff35f9aafc5e54733d4ff
---
M scripts/interwikidata.py
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/scripts/interwikidata.py b/scripts/interwikidata.py
index a20f72f..f31a66e 100755
--- a/scripts/interwikidata.py
+++ b/scripts/interwikidata.py
@@ -249,7 +249,11 @@
     options = {}
     for arg in local_args:
         option, _, value = arg.partition(':')
-        option = option[1:] if option.startswith('-') else None
+        if option.startswith('-'):
+            option = option[1:]
+        else:
+            continue
+
         if option == 'summary':
             options[option] = value
         else:

