Fix lisp-format, scheme-format: Add a loop normalization.
* gettext-tools/src/format-lisp.c (normalize_outmost_list): Algorithmic fixes.
* gettext-tools/src/format-scheme.c (normalize_outmost_list): Likewise.
* gettext-tools/tests/format-lisp-2: Add another test.
* gettext-tools/tests/format-scheme-2: Likewise.
