Problem was when we added a problem with empty string as an answer it created the problem instead of throwing an excpetion A test added to check that and exception is thrown when a problem is being created with empty string as an answer. A test is removed which used to test that problem should be graded incorrect if blank space is chosen as answer.
common ------ This directory contains common code shared between LMS and CMS, such as Mako templates, CSS, and Coffescript.