Finding tasks with complete status returns incomplete tasks

[seox123]

Description of the bug:

Using the command findT s/complete returns the incomplete tasks, instead of the complete tasks.

To reproduce:

Steps:

1. Add 2 different tasks using addT.
2. markT one of the 2 tasks.
3. Run the command findT s/complete.
4. The incomplete tasks are returned.

Expected behaviour:

The expected behaviour is that the complete tasks would be shown.

Screenshots/Video:
video:https://raw.githubusercontent.com/seox123/pe/main/files/d480c93a-f8c5-4882-baf5-c7b90a7ece24.mp4

Justification:

This is a feature that a user will likely use very commonly to differentiate between completed and incomplete tasks. It is also not difficult for a user to happen upon this bug.

[nus-pe-script]

Team's Response

This is a duplicate of #496.

The 'Original' Bug

[The team marked this bug as a duplicate of the following bug]

findT s/complete lists tasks that are incomplete instead of complete

---

_{[original: nus-cs2103-AY2223S1/pe-interim#433] [original labels: severity.Medium type.FunctionalityBug]}

Their Response to the 'Original' Bug

[This is the team's response to the above 'original' bug]

We accept your bug.

Items for the Tester to Verify

:question: Issue duplicate status

Team chose to mark this issue as a duplicate of another issue (as explained in the Team's response above)

• [ ] I disagree

Reason for disagreement: [replace this with your explanation]

---