tests/test-diff-newlines.t

summary: show active bookmark even if not at current changeset

Before this change, 'hg summary' would not show the active bookmark
unless it pointed to the working directory parent. After this change, it
will show it in parentheses, like so:

parent: 18581:f0ff45fe6700 tip
 summary: simplify handling of active bookmark
branch: default
bookmarks: [crew]
commit: (clean)
update: (current)

  $ hg init

  $ python -c 'file("a", "wb").write("confuse str.splitlines\nembedded\rnewline\n")'
  $ hg ci -Ama -d '1 0'
  adding a

  $ echo clean diff >> a
  $ hg ci -mb -d '2 0'

  $ hg diff -r0 -r1
  diff -r 107ba6f817b5 -r 310ce7989cdc a
  --- a/a	Thu Jan 01 00:00:01 1970 +0000
  +++ b/a	Thu Jan 01 00:00:02 1970 +0000
  @@ -1,2 +1,3 @@
   confuse str.splitlines
   embedded\r (no-eol) (esc)
  newline
  +clean diff