Feedback on week 5 project progress for shuiyao-sg

[nus-se-bot]

Leftovers from the previous week

• You are done with previous weeks work(:heavy_check_mark: well done!)

Progress of this week

• At least 2 PRs are in your fork(:heavy_check_mark: well done!)

• A version tagged C-Undo is in the repo(:heavy_check_mark: well done!)

_{Note: the above observation was done by the CS2103-feedback-bot and covers changes up to 2019-09-13 00:00:00 only. If you think the above observation is incorrect, please let us know by replying in this thread. Please include links to relevant PRs/comments in your response.}