Use macro constants for "skip1" and "skip2" instead of assigning them
each loop iteration.
Reformat the multi-case entries in the "big switch" so the lines don't wrap.
* Escape characters in the string needed to be processed as they were
encountered, otherwise a "\000" octal constant would prematurely
terminate the formatting string.
* Implemented the %b, SysV echo(1) compatibility, formatting directive.