check-code: recognise %= as an operator

contrib/check-code.py

@@ -172,13 +172,13 b' pypats = ['
      "gratuitous whitespace after Python keyword"),
     (r'([\(\[][ \t]\S)|(\S[ \t][\)\]])', "gratuitous whitespace in () or []"),
 #    (r'\s\s=', "gratuitous whitespace before ="),
-    (r'[^>< ](\+=|-=|!=|<>|<=|>=|<<=|>>=)\S',
+    (r'[^>< ](\+=|-=|!=|<>|<=|>=|<<=|>>=|%=)\S',
      "missing whitespace around operator"),
-    (r'[^>< ](\+=|-=|!=|<>|<=|>=|<<=|>>=)\s',
+    (r'[^>< ](\+=|-=|!=|<>|<=|>=|<<=|>>=|%=)\s',
      "missing whitespace around operator"),
-    (r'\s(\+=|-=|!=|<>|<=|>=|<<=|>>=)\S',
+    (r'\s(\+=|-=|!=|<>|<=|>=|<<=|>>=|%=)\S',
      "missing whitespace around operator"),
-    (r'[^^+=*/!<>&| -](\s=|=\s)[^= ]',
+    (r'[^^+=*/!<>&| %-](\s=|=\s)[^= ]',
      "wrong whitespace around ="),
     (r'raise Exception', "don't raise generic exceptions"),
     (r' is\s+(not\s+)?["\'0-9-]', "object comparison with literal"),