/usr/share/yelp/mathjax/jax/output/HTML-CSS/fonts/TeX/SansSerif/ is in yelp 3.10.2-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/yelp/mathjax/jax/output/HTML-CSS/fonts/TeX/SansSerif/Bold/
/usr/share/yelp/mathjax/jax/output/HTML-CSS/fonts/TeX/SansSerif/Bold/BasicLatin.js
/usr/share/yelp/mathjax/jax/output/HTML-CSS/fonts/TeX/SansSerif/Bold/CombDiacritMarks.js
/usr/share/yelp/mathjax/jax/output/HTML-CSS/fonts/TeX/SansSerif/Bold/Main.js
/usr/share/yelp/mathjax/jax/output/HTML-CSS/fonts/TeX/SansSerif/Bold/Other.js
/usr/share/yelp/mathjax/jax/output/HTML-CSS/fonts/TeX/SansSerif/Italic/
/usr/share/yelp/mathjax/jax/output/HTML-CSS/fonts/TeX/SansSerif/Italic/BasicLatin.js
/usr/share/yelp/mathjax/jax/output/HTML-CSS/fonts/TeX/SansSerif/Italic/CombDiacritMarks.js
/usr/share/yelp/mathjax/jax/output/HTML-CSS/fonts/TeX/SansSerif/Italic/Main.js
/usr/share/yelp/mathjax/jax/output/HTML-CSS/fonts/TeX/SansSerif/Italic/Other.js
/usr/share/yelp/mathjax/jax/output/HTML-CSS/fonts/TeX/SansSerif/Regular/
/usr/share/yelp/mathjax/jax/output/HTML-CSS/fonts/TeX/SansSerif/Regular/BasicLatin.js
/usr/share/yelp/mathjax/jax/output/HTML-CSS/fonts/TeX/SansSerif/Regular/CombDiacritMarks.js
/usr/share/yelp/mathjax/jax/output/HTML-CSS/fonts/TeX/SansSerif/Regular/Main.js
/usr/share/yelp/mathjax/jax/output/HTML-CSS/fonts/TeX/SansSerif/Regular/Other.js