diff -r 0eb093e40813 -r f8f7ae0f4d98 mercurial/fileset.py
--- a/mercurial/fileset.py	Wed Jul 15 04:45:58 2015 +0900
+++ b/mercurial/fileset.py	Sun Jul 05 11:06:58 2015 +0900
@@ -10,6 +10,7 @@
 from i18n import _
 
 elements = {
+    # token-type: binding-strength, prefix, infix, suffix
     "(": (20, ("group", 1, ")"), ("func", 1, ")")),
     "-": (5, ("negate", 19), ("minus", 5)),
     "not": (10, ("not", 10)),