fix lint issue

Author: jacekkopecky

lib/operators/input.coffee

@@ -39,7 +39,7 @@ class InsertCancellable extends Insert
 
   confirmTransaction: (transaction) ->
     super
-    if @typedText?.length == 0
+    if @typedText?.length is 0
       @vimState.history.shift() if @vimState.history[0] is @
 
 class InsertAfter extends Insert