Merge pull request #229 from coding-for-reproducible-research/intro_to_python_quiz_typo

typo is quiz for intro to python

Author: liamjberrisford

where_is_my_understanding/quizes/introduction_to_python.json

@@ -89,7 +89,7 @@
             {
                 "answer": "a = 100",
                 "correct": true,
-                "feedback": "Incorrect."
+                "feedback": "Correct."
             },
             {
                 "answer": "int a = 100",