check-code: catch "echo > $HGRCPATH" too

Make error message consistent with the other error messages.

contrib/check-code.py

@@ -66,7 +66,7 b' testpats = ['
     (r'^source\b', "don't use 'source', use '.'"),
     (r'touch -d', "don't use 'touch -d', use 'touch -t' instead"),
     (r'ls\s+[^|-]+\s+-', "options to 'ls' must come before filenames"),
-    (r'[^>]>\s*\$HGRCPATH <<EOF', "append to $HGRCPATH, do not overwrite it"),
+    (r'[^>]>\s*\$HGRCPATH', "don't overwrite $HGRCPATH, append to it"),
 ]
 
 testfilters = [