Also made `match_items()' more strict about matching
space/newline/prompt after the last item.
Added options to match_items():
- end-newline
- end-prompt
- end-space
and transferred them to other functions.
Function `assert_complete()' now has a `-nospace' option to explicitly
disallow a space after a completion...
Function `assert_bash_list()' now expects a single item to be followed
by a newline.