pull out some common functions. wrap coffee compiled stuff in a function call. escape string for regexp.

Gruntfile.coffee

@@ -25,7 +25,6 @@ module.exports = (grunt) ->
       gruntfile:
         files: src: ['Gruntfile.coffee']
     coffee: src:
-      options: bare: true
       files:
         '<%= meta.target %>radians.js': [
           '<%= meta.src %>**/*.coffee'

src/radians/contenteditable.coffee

@@ -1,3 +1,11 @@
+# utility functions to escape a query
+# @param str the string to escape
+escapeRegexp = (str) -> str.replace /([.?*+^$[\]\\(){}|-])/g, "\\$1"
+
+# removes all img tags
+# @param str a string possibly containing img tags
+noImg = (str) -> str.replace /<img[^>]*>/g, ''
+
 angular.module('radians.contenteditable', [])
 .directive('contenteditable', ->
   require: 'ngModel',
@@ -22,11 +30,12 @@ angular.module('radians.contenteditable', [])
     null
 )
 .filter('typeaheadHighlight', ->
+  # don't highlight anything!
   (matchItem, query) -> matchItem
 )
 .filter('ignoreImgFilter', ->
-  noImg = (s) -> s.replace(/<img[^>]*>/, '')
+  # when matching query against the items, ignore all img tags
   (items, query) ->
     item for item in items \
-    when noImg(item).match(new RegExp(noImg(query), 'gi'))
+    when noImg(item).match(new RegExp(escapeRegexp(noImg(query)), 'gi'))
 )