adding . to unary operators fix error of tokenize_code but doesn't give expected behavior

Author: Reinhold Bertram

tokenize_code.m

@@ -33,7 +33,7 @@
                  '.+' '.-' '.*' './' '.^' '.\' ...
                  '>' '<' '~' '==' '>=' '<=' '~=' ...
                  '@' '=' ',' ';' '||' '&&' '|' '&' '...' ':'};
-    unary_operators = '+-@~';
+    unary_operators = '+-@~.';
 
     spaces = sprintf(' \t');
     breaks = sprintf('\n\r');