Increase test coverage for svg.py

[yiweelan]

Increase test coverage for syg.py. #395 This relates to the lines not covered in "transform_to_rect_viewport" function.

Checklist:

• The GitHub pipeline is OK (green),
  meaning that both pylint (static code analyzer) and black (code formatter) are happy with the changes of this PR.

• A unit test is covering the code added / modified by this PR

• This PR is ready to be merged

• In case of a new feature, docstrings have been added, with also some documentation in the docs/ folder

• A mention of the change is present in CHANGELOG.md

By submitting this pull request, I confirm that my contribution is made under the terms of the GNU LGPL 3.0 license.

[Lucas-C]

Thank you @yiweelan for this PR!

@allcontributors please add @yiweelan for code

[allcontributors]

@Lucas-C

I've put up a pull request to add @yiweelan! 🎉

[codecov]

Codecov Report

Base: 93.85% // Head: 93.99% // Increases project coverage by +0.13% 🎉

Coverage data is based on head (f774d81) compared to base (8a43f1d).
Patch has no changes to coverable lines.

❗ Current head f774d81 differs from pull request most recent head 415d295. Consider uploading reports for the commit 415d295 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #620      +/-   ##
==========================================
+ Coverage   93.85%   93.99%   +0.13%     
==========================================
  Files          24       25       +1     
  Lines        6415     6431      +16     
  Branches     1148     1148              
==========================================
+ Hits         6021     6045      +24     
+ Misses        224      220       -4     
+ Partials      170      166       -4     

Impacted Files	Coverage Δ
fpdf/__init__.py	100.00% <0.00%> (ø)
fpdf/svg.py	98.30% <0.00%> (+1.69%)	⬆️

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[Lucas-C]

@yiweelan are you OK with my minor code suggestions?

If so I'm going to merge them and then your PR

Just waiting for your feedback 😊

[yiweelan]

Yes, I am okay with the code suggestion. Sorry this is my first ever pull request, so I don't really know how everything works.

[Lucas-C]

No worries! Merged, thak you for your contribution :)