🔧 simplify logic in scanDelims

[chrisjsewell]

ports markdown-it/markdown-it@5e90063

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.74%. Comparing base (e400964) to head (0f41fb6).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #365      +/-   ##
==========================================
- Coverage   95.74%   95.74%   -0.01%     
==========================================
  Files          64       64              
  Lines        3434     3431       -3     
==========================================
- Hits         3288     3285       -3     
  Misses        146      146              

Flag	Coverage Δ
pytests	95.74% <100.00%> (-0.01%)	⬇️

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.