Short ImageAltText ->
Arg Short_string : &String 
    Text : String, Max_length : Integer

- WordsIn Text ' ' ( W : 
                         If Short_string._ + ' '._ + W._ < Max_length then 
                          If !Short_string then Short_string = W
                          Else Short_string '= ' ' W
                         Else
                          _
                   )

Short_string '= '...' [ Short_string._ < Text._ ]

/