Fixed rendering of fractions in highest averages table in Model P 22-2

[Lionqueen94]

What & why

The rendering of fractions in the highest averages table had broken with a change in #3436
This PR fixes this.

How to test

Render a PDF with one of the gte-19-seats inputs and/or check the below PDFs.

Broken PDF (see page 9):
templates-3.pdf

Fixed PDF (see page 9):
templates-2.pdf

Reviewer notes

Unfortunately we missed this in the initial review, it would help to have the PDF diff check render all the variants, but this will be quite a refactor I think :/

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.15%. Comparing base (2c4eef8) to head (de49c7f).

[praseodym]

it would help to have the PDF diff check render all the variants, but this will be quite a refactor I think :/

I don't think this is too difficult, I'll see if I can change it to at least render using the inputs in backend/templates/inputs/extra-model-p-22-2-variations.

[praseodym]

it would help to have the PDF diff check render all the variants, but this will be quite a refactor I think :/

I don't think this is too difficult, I'll see if I can change it to at least render using the inputs in backend/templates/inputs/extra-model-p-22-2-variations.

See #3464

[praseodym]

Looks like the new PDF diff works well!