test, provide regression test for issue 18

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
fix, issue 18, check unconsumed chars in input string after specifier string has been consumed

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
fix, follow-up, to retain behaviour along with the fixes for

issue 18 (in b945636), pass on the list of default input formats to match when
looking for ddiff's reference stamp.

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'bug/18' into next

* bug/18:
  fix, follow-up, to retain behaviour along with the fixes for
  fix, issue 18, check unconsumed chars in input string after specifier string has been consumed
  test, provide regression test for issue 18