Remove escape characters when surrounded by whitespace

Quick and dirty fix for #47. This removes whitespace and newlines around an escape character when an escape character is present, replacing it with a single space.

Author: ezekg

src/serialiser.coffee

@@ -35,6 +35,8 @@ class Serialiser
 
     unless typeof serialised is 'string' or serialised is null
       throw new Error("serialiser #{node.type} didn\'t return a string")
+      
+    serialised = serialised.replace /[\s\n]+\\[\s\n]+/g, ' '
 
     serialised