Graph parse bug

[yoonieaj]

Proposed Changes

This PR fixes a bug where parsing all pre-generated graphs (i.e., course graphs) would fail.

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Type	Applies?
🚨 Breaking change (fix or feature that would cause existing functionality to change)
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[coveralls]

Pull Request Test Coverage Report for Build 09f59d88-cdbb-41f9-96fd-9405ba67320e

Details

• 17 of 20 (85.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.02%) to 54.119%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
app/Svg/Parser.hs	17	20	85.0%

Totals
Change from base Build fd49a1b4-f6ed-440a-ae12-ad2cbdc17a11:	-0.02%
Covered Lines:	2105
Relevant Lines:	3891

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💛 - Coveralls

[david-yz-liu]

@yoonieaj this change is good, but please update the PR description and Changelog to be more descriptive about the specific bug that this is fixing. I.e., what types of SVG text structure is being supported now that wasn't previously supported?