fix(learn): prevent errexit on '((completed++))'

[meleu]

📚 Description

Run bashunit learn, complete the first lesson, and then check your progress... 💥

bashunit-learn-bug-2026-03-10_06.30.12.mp4

The problem is caused by the exit status of ((completed++)), which is non-zero if you have any lesson completed. This causes errexit.

The expected result (which I got after the fix) is to see the list of completed lessons and then back to the bashunit learn prompt, like this:

Enter your choice:
p

Your Progress:

  ✓ Lesson 1 completed
  ○ Lesson 2
  ○ Lesson 3
  ○ Lesson 4
  ○ Lesson 5
  ○ Lesson 6
  ○ Lesson 7
  ○ Lesson 8
  ○ Lesson 9
  ○ Lesson 10

Progress: 1/10 lessons completed
Press Enter to continue...

🔖 Changes

Simply added || true, as it seems to be the common practice in other places of the codebase.

I also noticed that there isn't any test validating the bashunit learn behavior, then I didn't add any for such a simple fix.

✅ To-do list

• I updated the CHANGELOG.md to reflect the new feature or fix
• I updated the documentation to reflect the changes

[Chemaclass]

thanks!