tests/test-remove-new.t

bdiff: fix malloc(0) issue in fixws()

If fixws() is called on a zero-length string, malloc(0) is called and
expected to return a pointer. Which it does on e.g. Linux. AIX returns
NULL, which it is also legal, but the malloc() is then assumed to have
failed. So ensure a valid pointer is always returned.

test that 'hg commit' does not crash if the user removes a newly added file

  $ hg init
  $ echo This is file a1 > a
  $ hg add a
  $ hg commit -m "commit #0"
  $ touch b
  $ hg add b
  $ rm b
  $ hg commit -A -m"comment #1"
  removing b
  nothing changed
  [1]