Use a simpler escapeRegExp method

src/underscore-extensions.coffee

@@ -26,40 +26,7 @@ _.mixin
         original.apply(this, args)
 
   escapeRegExp: (string) ->
-    # Referring to the table here:
-    # https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/regexp
-    # these characters should be escaped
-    # \ ^ $ * + ? . ( ) | { } [ ]
-    # These characters only have special meaning inside of brackets
-    # they do not need to be escaped, but they MAY be escaped
-    # without any adverse effects (to the best of my knowledge and casual testing)
-    # : ! , =
-    # my test "~!@#$%^&*(){}[]`/=?+\|-_;:'\",<.>".match(/[\#]/g)
-
-    specials = [
-      # order matters for these
-      "-"
-      "["
-      "]"
-      # order doesn't matter for any of these
-      "/"
-      "{"
-      "}"
-      "("
-      ")"
-      "*"
-      "+"
-      "?"
-      "."
-      "\\"
-      "^"
-      "$"
-      "|"]
-
-    # I choose to escape every character with '\'
-    # even though only some strictly require it when inside of []
-    regex = RegExp('[' + specials.join('\\') + ']', 'g')
-    string.replace(regex, "\\$&")
+    string.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&')
 
   humanizeEventName: (eventName, eventDoc) ->
     [namespace, event]  = eventName.split(':')