Minor refactor HtmlRenderer

[vjik]

Q	A
Is bugfix?	❌
New feature?	❌
Breaks BC?	❌

[codecov]

Codecov Report

❌ Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 86.92%. Comparing base (e7aaf96) to head (09a4b0b).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/Renderer/HtmlRenderer.php	83.33%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #168      +/-   ##
============================================
- Coverage     87.10%   86.92%   -0.19%     
- Complexity      215      216       +1     
============================================
  Files            19       19              
  Lines           698      696       -2     
============================================
- Hits            608      605       -3     
- Misses           90       91       +1     

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