Whitespace cleanup: tab removal in tests directory

Also changed space-based indentation in touched files if they used
4 spaces for indentation (instead of the most-often-used 2).

Also added new line to end of touched files if they did not end
that way.

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu

tests/jerry/json-stringify.js

@@ -123,7 +123,7 @@ assert (JSON.stringify (to_json_object) === "3");
 function replacer_function (key, value)
 {
   if (typeof(value) == "string")
-	return "FOO";
+    return "FOO";
   return value;
 }