Remove readUint32 usage from the isTrueTypeFile function

[Snuffleupagus]

This is the only readUint32 usage in the src/core/fonts.js file, and it can be trivially replaced with a string comparison.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 63.31%. Comparing base (169d8c9) to head (2e5ab9c).

Additional details and impacted files

@@            Coverage Diff             @@
##           master   #21078      +/-   ##
==========================================
- Coverage   63.34%   63.31%   -0.04%     
==========================================
  Files         177      177              
  Lines      124747   124719      -28     
==========================================
- Hits        79023    78965      -58     
- Misses      45724    45754      +30     

Flag	Coverage Δ
fonttest	7.64% <100.00%> (+<0.01%)	⬆️
unittestcli	63.28% <100.00%> (-0.04%)	⬇️

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[timvandermeij]

Looks good to me, with passing tests. Thanks!

[Snuffleupagus]

/botio unittest

[moz-tools-bot]

From: Bot.io (Linux m4)

---

Received

Command cmd_unittest from @Snuffleupagus received. Current queue size: 0

Live output at: http://54.241.84.105:8877/b10f114ff3688dd/output.txt

[moz-tools-bot]

From: Bot.io (Windows)

---

Received

Command cmd_unittest from @Snuffleupagus received. Current queue size: 1

Live output at: http://54.193.163.58:8877/18a71389341762f/output.txt

[moz-tools-bot]

From: Bot.io (Linux m4)

---

Success

Full output at http://54.241.84.105:8877/b10f114ff3688dd/output.txt

Total script time: 2.84 mins

• Unit Tests: Passed

[Snuffleupagus]

/botio-linux browsertest

[moz-tools-bot]

From: Bot.io (Linux m4)

---

Received

Command cmd_browsertest from @Snuffleupagus received. Current queue size: 1

Live output at: http://54.241.84.105:8877/0d5a9fdda34c35f/output.txt

[moz-tools-bot]

From: Bot.io (Windows)

---

Success

Full output at http://54.193.163.58:8877/18a71389341762f/output.txt

Total script time: 6.86 mins

• Unit Tests: Passed

[moz-tools-bot]

From: Bot.io (Linux m4)

---

Success

Full output at http://54.241.84.105:8877/0d5a9fdda34c35f/output.txt

Total script time: 18.36 mins

• Regression tests: Passed