Wrong error message when wrong multicharacter short option is passed

[ocervell]

Sometime it is usefull to have not only single char short option like -d but something like -dbg.

They are already working as-is (even though not documented), but when passing a wrong option such as -dbgwrong, the error displays: No such option: -d instead of No such option: -dbg.

[Rowlando13]

@davidism I have only seen single character short options. Do we intentionally support multi character short options?