This is the Full Monty, all Lapp possibilities
in one spec file

  -v, --verbose  short and long bool flag, default false
  --extra-stuff   just a long bool flag, ditto
  -S              just a short bool flag
  -n, --lines  (default 10)  short and log integer flag, explicit default
  -p, --ports  (integer...) array of integer flag (e.g. --ports '1002 1003')
  -s, --scale  (default 1.0)  float flag, explicit default
  -m           (float)    _required_ float flag (because no default)
  --libdir     (default '.')  string flag - use quotes for correct type!
  -I, --include... (string) multiple string flags (like -I. -Ilib)
  
Other lines are ignored:
  
  <args>      (string...) rest of args as an array of strings