STRING=
=======

Syntax: (string= <string1> <string2>
	  :START1 <number> :END1 <number>
         :START2 <number> :END2 <number>)

This function compares (parts of) strings with
differentiation between upper- and lowercase-
characters. It returns T, when the strings are
equal, otherwise NIL.

examples:      >(string= "Computer" "Computer")
               T

               >(string= "zusammen" "Programm"
                  :start1 3 :end1 6 :start2 5)
               T