bug#15883: 24.3.50; Mercurial view changeset diff in *view-change-log* shows wrong diff

[Claudio Bley]

1. visit a file under hg version control
2. C-x v l
3. navigate to a changeset whose parent changeset's revision is *not*
   the predecessor of the current changeset's revision
4. hit D

E.g. suppose the revision of the current changeset is 214.

So, log-view-diff-changeset will eventually call "hg diff -r 213 -r 214".

In this situation, it should actually just call "hg diff -c 214".

Or, "hg diff -r '214^' -r 214".

/ Claudio

In GNU Emacs 24.3.50.5 (i686-pc-mingw32)
 of 2013-11-04 on CLAUDIO-PC
Windowing system distributor `Microsoft Corp.', version 6.1.7601
Configured using:
 `configure --prefix=/c/emacs24.3
 CPPFLAGS=-I/c/Users/Claudio/src/emacs-dep/stage/include
 'LDFLAGS=-shared-libgcc -L/c/Users/Claudio/src/emacs-dep/stage/lib''

Important settings:
  value of $LANG: DEU
  locale-coding-system: cp1252
  default enable-multibyte-characters: t
-- 
Claudio-- 
Claudio