revset: lower precedence of minus infix (issue2361)

mercurial/revset.py

@@ -12,7 +12,7 b' from i18n import _'
 
 elements = {
     "(": (20, ("group", 1, ")"), ("func", 1, ")")),
-    "-": (19, ("negate", 19), ("minus", 19)),
+    "-": (5, ("negate", 19), ("minus", 5)),
     "::": (17, ("dagrangepre", 17), ("dagrange", 17),
            ("dagrangepost", 17)),
     "..": (17, ("dagrangepre", 17), ("dagrange", 17),

tests/test-revset.t

@@ -327,3 +327,5 b' quoting needed'
   2
   1
   0
+  $ log '4::8 - 8'
+  4