1. Add the color on the link to the referenced file, which is the more
likely thing the user wants to click
2. Use monospace font on the SHA
3. Tweak text colors
4. Change SHA link to go to the commit instead of the repo root with
commit filter set
5. Added the repo name to the file link text
6. Fix broken line numbering rendering
This PR removes (almost) all path tricks, and introduces "renderhelper"
package.
Now we can clearly see the rendering behaviors for comment/file/wiki,
more details are in "renderhelper" tests.
Fix#31411 , fix#18592, fix#25632 and maybe more problems. (ps: fix
#32608 by the way)
Remove unmaintainable sanitizer rules. No need to add special "class"
regexp rules anymore, use RenderInternal.SafeAttr instead, more details
(and examples) are in the tests
