Escape filenames and paths in HTML when generating index pages (#8317)

[Dreamsorcerer]

Co-authored-by: J. Nick Koston nick@koston.org
(cherry picked from commit ffbc432)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.39%. Comparing base (ed43040) to head (66f52e3).

Additional details and impacted files

@@           Coverage Diff           @@
##              3.9    #8319   +/-   ##
=======================================
  Coverage   97.39%   97.39%           
=======================================
  Files         108      108           
  Lines       32817    32842   +25     
  Branches     3889     3897    +8     
=======================================
+ Hits        31962    31987   +25     
  Misses        645      645           
  Partials      210      210           

Flag	Coverage Δ
CI-GHA	97.30% <100.00%> (+<0.01%)	⬆️
OS-Linux	96.98% <100.00%> (+<0.01%)	⬆️
OS-Windows	94.53% <57.14%> (-0.05%)	⬇️
OS-macOS	96.65% <57.14%> (-0.05%)	⬇️
Py-3.10.11	94.34% <53.57%> (-0.06%)	⬇️
Py-3.10.14	96.75% <96.42%> (-0.02%)	⬇️
Py-3.11.8	?
Py-3.11.9	97.02% <96.42%> (?)
Py-3.12.2	97.07% <100.00%> (+<0.01%)	⬆️
Py-3.8.10	94.32% <57.14%> (-0.05%)	⬇️
Py-3.8.18	96.70% <100.00%> (+<0.01%)	⬆️
Py-3.9.13	94.33% <57.14%> (-0.05%)	⬇️
Py-3.9.19	96.74% <100.00%> (-0.01%)	⬇️
Py-pypy7.3.15	96.29% <100.00%> (+<0.01%)	⬆️
VM-macos	96.65% <57.14%> (-0.05%)	⬇️
VM-ubuntu	96.98% <100.00%> (+<0.01%)	⬆️
VM-windows	94.53% <57.14%> (-0.05%)	⬇️

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