Matlab legacy fix

[ssun30]

Changes proposed in this pull request

• Fix several Matlab (MEX interface) samples due to changes in several YAML files.
• Added missing blank lines at the end of three files.
• Reformat files to match Cantera contribution guides.

If applicable, fill in the issue number this pull request is fixing

• In current release of Cantera, (2.6.0) some Matlab examples would return an error due to changes in phase names in several YAML files.
• An example is h2o2.yaml, where the 'gas' phase is renamed to 'ohmech'. This affects examples that use this specific YAML file.
• With this update, the auto test script test_examples.m will run all examples without issues.

Checklist

• The pull request includes a clear description of this code change
• Commit messages have short titles and reference relevant issues
• Build passes (scons build & scons test) and unit tests address code coverage
• Style & formatting of contributed code follows contributing guidelines
• The pull request is ready for review

[ischoegl]

@ssun30 ... thanks for the bug fixes - the incorrect phase for the Solution was something that was introduced a while ago (#1109, I didn't catch this in my review) - in an earlier version, this used GRI-Mech, where the phase was correct.

I'm not sure that it's worth changing sample names or update formatting (beyond the newlines) - as this will become legacy code soon, I'd rather leave things as is, even if this doesn't exactly fit the mold.

As the remaining changes are modest, please squash your commits.

PS: Please feel free to add yourself to the AUTHORS file in the root folder

[ssun30]

I've squashed all the changes and addressed all reviews. I think this is ready for merge.

[codecov]

Codecov Report

Merging #1414 (aff6c97) into main (6042429) will decrease coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1414      +/-   ##
==========================================
- Coverage   70.79%   70.78%   -0.02%     
==========================================
  Files         373      373              
  Lines       53872    53872              
  Branches    17579    17579              
==========================================
- Hits        38139    38131       -8     
- Misses      13332    13339       +7     
- Partials     2401     2402       +1     

Impacted Files	Coverage Δ
...terfaces/dotnet/Cantera/src/Interop/InteropUtil.cs	60.75% <0.00%> (-8.87%)	⬇️
src/base/stringUtils.cpp	79.03% <0.00%> (-0.81%)	⬇️

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[ischoegl]

Thank you @ssun30 - this looks good to me!