Comment by klodolph

Right, "don't do it" is imperative mood, not indicative mood. If it were indicative mood, the clause would need a subject but in a casual internet forum I can see why people would omit the subject anyway ¯\_(ツ)_/¯

This is one of the reasons why I don't use getopt_long() -- I don't WANT short flags to be combined, for most commands I write. Fortunately, getopt_long() is one of those library functions that is truly trivial to reimplement and not something that has arcane behavior or edge cases.