Bugfix: Short console arguments should not match when a single invalid exists.

Bugfix: Short console arguments should not match when a single invalid exists.

While convenient, "fake -help" should not print help.
This is because there is no short command starting with the letters "e" or "l".

This behavior of succeeded is confusing and misleading.

Redesign the logic to better handle this.

Improve the unit tests to catch more cases, including this one.