Fix reconciliate mechanism after multiple new lines

[aringenbach]

Should fix element-hq/element-ios#7570

Fixes an issue with the reconciliate mechanism that was inserting replacement characters in the wrong position after multiple newlines. It was due to its blind filtering of ZWSP placeholders that don't always match.

Now the actual HTML chars are computed for comparison which makes the results of StringDiffer directly match the position in the Rust model.

Also this change fixes a few SwiftFormat issues.

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

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[codecov-commenter]

Codecov Report

Patch coverage: 97.56% and project coverage change: +1.86 🎉

Comparison is base (70a2fbf) 88.22% compared to head (5d5570e) 90.09%.

Additional details and impacted files

@@             Coverage Diff              @@
##               main     #705      +/-   ##
============================================
+ Coverage     88.22%   90.09%   +1.86%     
============================================
  Files           144      109      -35     
  Lines         16633    15340    -1293     
  Branches        762      551     -211     
============================================
- Hits          14674    13820     -854     
+ Misses         1773     1502     -271     
+ Partials        186       18     -168     

Flag	Coverage Δ
uitests	84.16% <97.56%> (+9.15%)	⬆️
uitests-android	?
uitests-ios	84.16% <97.56%> (+0.28%)	⬆️
unittests	88.77% <97.56%> (+1.03%)	⬆️
unittests-android	?
unittests-ios	78.69% <97.56%> (+1.22%)	⬆️
unittests-rust	89.79% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...ces/WysiwygComposer/Extensions/ComposerModel.swift	87.50% <ø> (ø)
...WysiwygComposerView/WysiwygComposerViewModel.swift	94.29% <87.50%> (+0.20%)	⬆️
...MLParser/Extensions/NSAttributedString+Range.swift	98.96% <100.00%> (+0.26%)	⬆️
...LParser/Extensions/NSMutableAttributedString.swift	94.80% <100.00%> (+0.06%)	⬆️
...siwygComposer/Sources/HTMLParser/Replacement.swift	100.00% <100.00%> (ø)
...r/Sources/WysiwygComposer/Tools/StringDiffer.swift	88.70% <100.00%> (+11.78%)	⬆️

... and 36 files with indirect coverage changes

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[jonnyandrew]

Looks good to me