revert: use "discard"/"revert" verb when reverting interactively (issue5143)

Instead of "record this change to 'FILE'?" now prompt with:

* "discard this change to 'FILE'?" when reverting to the parent of working
  directory, and,
* "revert this change to 'FILE'?" otherwise.

mercurial/cmdutil.py

@@ -3301,10 +3301,12 b' def _performrevert(repo, parents, ctx, a'
         else:
             diff = patch.diff(repo, None, ctx.node(), m, opts=diffopts)
         originalchunks = patch.parsepatch(diff)
+        operation = _('discard') if node == parent else _('revert')
 
         try:
 
-            chunks, opts = recordfilter(repo.ui, originalchunks)
+            chunks, opts = recordfilter(repo.ui, originalchunks,
+                                        operation=operation)
             if reversehunks:
                 chunks = patch.reversehunks(chunks)
 

mercurial/patch.py

@@ -1109,11 +1109,12 b' the hunk is left unchanged.'
             if skipfile is None and skipall is None:
                 chunk.pretty(ui)
             if total == 1:
-                msg = _("record this change to '%s'?") % chunk.filename()
+                msg = _("%s this change to '%s'?") % (operation,
+                                                      chunk.filename())
             else:
                 idx = pos - len(h.hunks) + i
-                msg = _("record change %d/%d to '%s'?") % (idx, total,
-                                                           chunk.filename())
+                msg = _("%s change %d/%d to '%s'?") % (operation, idx, total,
+                                                       chunk.filename())
             r, skipfile, skipall, newpatches = prompt(skipfile,
                     skipall, msg, chunk)
             if r:

tests/test-revert-interactive.t

@@ -64,7 +64,7 b' 10 run the same test than 8 from within '
    3
    4
    5
-  record change 1/6 to 'f'? [Ynesfdaq?] y
+  revert change 1/6 to 'f'? [Ynesfdaq?] y
   
   @@ -1,5 +2,6 @@
    1
@@ -73,7 +73,7 b' 10 run the same test than 8 from within '
    4
    5
   +b
-  record change 2/6 to 'f'? [Ynesfdaq?] y
+  revert change 2/6 to 'f'? [Ynesfdaq?] y
   
   diff --git a/folder1/g b/folder1/g
   2 hunks, 2 lines changed
@@ -86,7 +86,7 b' 10 run the same test than 8 from within '
    3
    4
    5
-  record change 3/6 to 'folder1/g'? [Ynesfdaq?] y
+  revert change 3/6 to 'folder1/g'? [Ynesfdaq?] y
   
   @@ -1,5 +2,6 @@
    1
@@ -95,7 +95,7 b' 10 run the same test than 8 from within '
    4
    5
   +d
-  record change 4/6 to 'folder1/g'? [Ynesfdaq?] n
+  revert change 4/6 to 'folder1/g'? [Ynesfdaq?] n
   
   diff --git a/folder2/h b/folder2/h
   2 hunks, 2 lines changed
@@ -163,7 +163,7 b' Test that --interactive lift the need fo'
    3
    4
    5
-  record change 1/6 to 'f'? [Ynesfdaq?] y
+  revert change 1/6 to 'f'? [Ynesfdaq?] y
   
   @@ -1,5 +2,6 @@
    1
@@ -172,7 +172,7 b' Test that --interactive lift the need fo'
    4
    5
   +b
-  record change 2/6 to 'f'? [Ynesfdaq?] y
+  revert change 2/6 to 'f'? [Ynesfdaq?] y
   
   diff --git a/folder1/g b/folder1/g
   2 hunks, 2 lines changed
@@ -185,7 +185,7 b' Test that --interactive lift the need fo'
    3
    4
    5
-  record change 3/6 to 'folder1/g'? [Ynesfdaq?] y
+  revert change 3/6 to 'folder1/g'? [Ynesfdaq?] y
   
   @@ -1,5 +2,6 @@
    1
@@ -194,7 +194,7 b' Test that --interactive lift the need fo'
    4
    5
   +d
-  record change 4/6 to 'folder1/g'? [Ynesfdaq?] n
+  revert change 4/6 to 'folder1/g'? [Ynesfdaq?] n
   
   diff --git a/folder2/h b/folder2/h
   2 hunks, 2 lines changed
@@ -242,7 +242,7 b' Test that --interactive lift the need fo'
    3
    4
    5
-  record change 1/2 to 'f'? [Ynesfdaq?] y
+  discard change 1/2 to 'f'? [Ynesfdaq?] y
   
   @@ -2,6 +1,5 @@
    1
@@ -251,7 +251,7 b' Test that --interactive lift the need fo'
    4
    5
   -b
-  record change 2/2 to 'f'? [Ynesfdaq?] n
+  discard change 2/2 to 'f'? [Ynesfdaq?] n
   
   $ hg st
   M f
@@ -303,7 +303,7 b' 3) Use interactive revert with editing ('
   -1
   +0
   +2
-  record this change to 'k'? [Ynesfdaq?] e
+  discard this change to 'k'? [Ynesfdaq?] e
   
   $ cat k
   42
@@ -350,7 +350,7 b' Check the experimental config to invert '
    1
    2
    3
-  record change 1/3 to 'folder1/g'? [Ynesfdaq?] y
+  discard change 1/3 to 'folder1/g'? [Ynesfdaq?] y
   
   @@ -2,7 +1,7 @@
    c
@@ -361,13 +361,13 b' Check the experimental config to invert '
   +4
    5
    d
-  record change 2/3 to 'folder1/g'? [Ynesfdaq?] y
+  discard change 2/3 to 'folder1/g'? [Ynesfdaq?] y
   
   @@ -7,3 +6,2 @@
    5
    d
   -lastline
-  record change 3/3 to 'folder1/g'? [Ynesfdaq?] n
+  discard change 3/3 to 'folder1/g'? [Ynesfdaq?] n
   
   $ hg diff --nodates
   diff -r a3d963a027aa folder1/g