Refresh line numbers in gutter by setting innerHTML for speed

src/atom/gutter.coffee

@@ -1,4 +1,4 @@
-{View, $$} = require 'space-pen'
+{View, $$$} = require 'space-pen'
 
 $ = require 'jquery'
 _ = require 'underscore'
@@ -11,7 +11,8 @@ class Gutter extends View
   renderLineNumbers: ->
     lastRow = -1
     screenRows = @parentView.bufferRowsForScreenRows()
-    @html $$ ->
+
+    this.innerHTML = $$$ ->
       for row in screenRows
         @div {class: 'line-number'}, if row == lastRow then '•' else row + 1
         lastRow = row