Make Pascal keywords case-insensitive

FIX: Make Pascal keyword matching case-insensitive.

mode/pascal.js

@@ -58,7 +58,7 @@ function tokenBase(stream, state) {
     return "operator";
   }
   stream.eatWhile(/[\w\$_]/);
-  var cur = stream.current();
+  var cur = stream.current().toLowerCase();
   if (keywords.propertyIsEnumerable(cur)) return "keyword";
   if (atoms.propertyIsEnumerable(cur)) return "atom";
   return "variable";