Feedback on week 4 project progress for greatnest

[nus-pe-script]

Leftovers from the previous week

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

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

Progress of this week

• A version tagged Level-6 is in the repo(:heavy_check_mark: well done!)

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

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

• A version tagged Level-9 is in the repo(:heavy_check_mark: well done!)

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

• Has branchesbranch-Level-6 branch-Level-9 in the repo(:heavy_check_mark: well done!)

_{Note: the above observation was done by the CS2113-feedback-bot and covers changes up to 2019-09-06 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.}