check-code: only treat a # as a line in a t-test if it has a space before it

Prior to this, check-code wouldn't notice things like (glob)
annotations or similar in a test if they were after a # anywhere in
the line. This resolves a defect in a future change, and also exposed
a couple of small spots that needed some attention.

contrib/check-code.py

@@ -224,7 +224,7 b' for i in [0, 1]:'
 
 utestfilters = [
     (r"<<(\S+)((.|\n)*?\n  > \1)", rephere),
-    (r"( *)(#([^\n]*\S)?)", repcomment),
+    (r"( +)(#([^\n]*\S)?)", repcomment),
 ]
 
 pypats = [