tests/test-issue1089.t

util: warn when adding paths ending with \

Paths ending with \ will fail the verification introduced in 684a977c2ae0 when
checking out on Windows ... and if it didn't fail it would probably not do what
the user expected.

http://mercurial.selenic.com/bts/issue1089

  $ hg init
  $ mkdir a
  $ echo a > a/b
  $ hg ci -Am m
  adding a/b

  $ hg rm a
  removing a/b (glob)
  $ hg ci -m m a

  $ mkdir a b
  $ echo a > a/b
  $ hg ci -Am m
  adding a/b

  $ hg rm a
  removing a/b (glob)
  $ cd b

Relative delete:

  $ hg ci -m m ../a

  $ cd ..