Typo in _buildmodel dict restore (Fixes #956)

[stuart-cls]

Description

Correct typo in _buildmodel dict restore (Fixes #956)

The issue only manifested on Voigt and SkewedVoigt models for me, not sure if you want to change the test_model_saveload.test_save_load_model code just to catch this.

Type of Changes

• [x] Bug fix
• [ ] New feature
• [ ] Refactoring / maintenance
• [ ] Documentation / examples

Tested on

lmfit: 1.3.1.post0+g3cfd09a.d20240510, scipy: 1.13.0, numpy: 1.26.4, asteval: 0.9.32, uncertainties: 3.1.7

Verification

Have you

• [ ] included docstrings that follow PEP 257?
• [x] referenced existing Issue and/or provided relevant link to mailing list?
• [x] verified that existing tests pass locally?
• [x] verified that the documentation builds locally?
• [x] squashed/minimized your commits and written descriptive commit messages?
• [ ] added or updated existing tests to cover the changes?
• [ ] updated the documentation and/or added an entry to the release notes (doc/whatsnew.rst)?
• [ ] added an example?

[reneeotten]

thanks for the fix @stuart-cls. It would certainly be good if this was discovered by our test-suite, so I would be in favor of adding/expanding the current tests to cover all built-in models. If you'd be willing to add that to this PR that would be great. If not, that's also fine and I would be okay with merging this PR - we can expand the tests in a follow-up.

[newville]

@stuart-cls Thanks - I'm a little surprised our existing tests did not catch that. But I agree with @reneeotten that we can make sure this gets tested better.

This is simple / clear enough that we can just merge this. Thanks!