check-code: there must also be whitespace between ')' and operator

The check pattern only checked for whitespace between keyword and operator.

Now it also warns:
 >     x = f(),7
 missing whitespace after ,
 >     x = f()+7
 missing whitespace in expression

contrib/check-code.py

@@ -133,8 +133,8 b' pypats = ['
     (r'\S;\s*\n', "semicolon"),
     (r'[^_]_\("[^"]+"\s*%', "don't use % inside _()"),
     (r"[^_]_\('[^']+'\s*%", "don't use % inside _()"),
-    (r'\w,\w', "missing whitespace after ,"),
-    (r'\w[+/*\-<>]\w', "missing whitespace in expression"),
+    (r'(\w|\)),\w', "missing whitespace after ,"),
+    (r'(\w|\))[+/*\-<>]\w', "missing whitespace in expression"),
     (r'^\s+\w+=\w+[^,)\n]$', "missing whitespace in assignment"),
     (r'(\s+)try:\n((?:\n|\1\s.*\n)+?)\1except.*?:\n'
      r'((?:\n|\1\s.*\n)+?)\1finally:', 'no try/except/finally in Python 2.4'),