shortname: compatible with older Matlab

Author: scivision

+stdlib/+fileio/windows_shortname.m

@@ -9,12 +9,9 @@
 %
 
 
-arguments (Input)
+arguments
   p (1,1) string
 end
-arguments (Output)
-  short (1,1) string
-end
 
 short = "";
 
@@ -33,6 +30,8 @@
     warning('%s is not folder or file', p);
 end
 
+short = string(short);
+
 delete(fso);
 
 end