fix qlim, q, n

[LonelyPaprika]

Summary

Related issue

Fixes #665

Checklist

Only the first item below is checked automatically — the rest are a self-check for you before requesting review, nothing currently verifies them for you.

• PR title follows Conventional Commits (type: description) — checked automatically, see the "Check PR title" status
• Tests pass locally (pytest)
• Added/updated tests for this change, if applicable
• New/changed code is type-hinted with modern syntax (X | Y, list[X], not Union/Optional/List)
• Docstrings updated (reST style: :param:, :returns:; type hints in the signature cover types now, :type:/:rtype: are rarely needed)
• PR is as small/focused as practical — if it tackles several unrelated things, consider splitting it so each can be reviewed and accepted independently
• No test files, data files, or notebooks specific to your own project — PyPI has strict package size limits, and RTB is already split into a toolbox and a data package. Notebooks, if of general interest, should have output cleared before committing.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 0.00%. Comparing base (2d24e0d) to head (3b6fe7e).

Files with missing lines	Patch %	Lines
src/roboticstoolbox/robot/Robot.py	0.00%	8 Missing ⚠️

Additional details and impacted files

@@          Coverage Diff          @@
##            main    #666   +/-   ##
=====================================
  Coverage   0.00%   0.00%           
=====================================
  Files        143     143           
  Lines      14050   14053    +3     
=====================================
- Misses     14050   14053    +3     

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[petercorke]

Thanks for submitting this PR, at the moment it can't be merged because you've marked it as draft. There's a gap in testing of the examples files, and to be honest some of the examples should be discarded and the rest need some polish. The notebooks at least have a smoke test.

[LonelyPaprika]

@petercorke Thanks for your answer, I am not completely sure if my approach is correct here so I will continue working on this PR and will let you know when ready. I like some of these examples so I will see if I can add a smoke test.