I have just uploaded version 1.6 of my Gapfill question type to the Moodle plugins database.
https://moodle.org/plugins/view.php?plugin=qtype_gapfill
If you are new to it, it is a very easy to use gap fill question type. This version has one bug fix, a tweak and a new feature. The new feature comes into effect when a quiz has display right answer set in the review settings. If a user enters an incorrect answer, on marking the correct answer will displayed in delimiters next to it. Here is a screen shot.
Thanks to Gordon McLeod of Glasgow University for inspiring this feature.
Detailed release notes are here
https://github.com/marcusgreen/moodle-qtype_gapfill/wiki/Gapfill-1.6-Release-Notes