adding newline before appending tail to combinedCode to prevent tail from being cut off by trailing comments in code editor

setting initialValue of reduce to newline for arrayToNewLineString to prevent cutting off code if trailing comments in json

client/commonFramework/init.js

@@ -28,7 +28,7 @@ window.common = (function(global) {
     seedData = Array.isArray(seedData) ? seedData : [seedData];
     return seedData.reduce(function(seed, line) {
       return '' + seed + line + '\n';
-    }, '');
+    }, '\n');
   };
 
   common.seed = common.arrayToNewLineString(common.challengeSeed);