Don't treat closing brackets specially in common lisp mode

FIX: Stop treating closing brackets as brackets in the Common Lisp mode.

mode/commonlisp.js

@@ -21,7 +21,7 @@ function base(stream, state) {
 
   if (ch == '"') return (state.tokenize = inString)(stream, state);
   else if (ch == "(") { type = "open"; return "bracket"; }
-  else if (ch == ")" || ch == "]") { type = "close"; return "bracket"; }
+  else if (ch == ")") { type = "close"; return "bracket"; }
   else if (ch == ";") { stream.skipToEnd(); type = "ws"; return "comment"; }
   else if (/['`,@]/.test(ch)) return null;
   else if (ch == "|") {