revset: also parse x^: as (x^):

Given x^:y is (x^):y, this seems sensible.

mercurial/revset.py

@@ -2323,11 +2323,14 @@ def _fixops(x):
     op = x[0]
     if op == 'parent':
         # x^:y means (x^) : y, not x ^ (:y)
+        # x^:  means (x^) :,   not x ^ (:)
         post = ('parentpost', x[1])
         if x[2][0] == 'dagrangepre':
             return _fixops(('dagrange', post, x[2][1]))
         elif x[2][0] == 'rangepre':
             return _fixops(('range', post, x[2][1]))
+        elif x[2][0] == 'rangeall':
+            return _fixops(('rangepost', post))
 
     return (op,) + tuple(_fixops(y) for y in x[1:])
 

tests/test-revset.t

@@ -504,6 +504,15 @@ infix/suffix resolution of ^ operator (issue2884):
   1
   2
 
+  $ try '9^:'
+  (rangepost
+    (parentpost
+      ('symbol', '9')))
+  * set:
+  <spanset+ 8:9>
+  8
+  9
+
  x^:y should be resolved before omitting group operators
 
   $ try '1^(:2)'
@@ -560,6 +569,22 @@ infix/suffix resolution of ^ operator (issue2884):
   1
   2
 
+  $ try '(9^:)^:'
+  (rangepost
+    (parentpost
+      (group
+        (rangepost
+          (parentpost
+            ('symbol', '9'))))))
+  * set:
+  <spanset+ 4:9>
+  4
+  5
+  6
+  7
+  8
+  9
+
  x^ in alias should also be resolved
 
   $ try 'A' --config 'revsetalias.A=1^:2'