The section edit link is not visible (pushed past right border) when a long section title does not wrap before the viewport right margin, on some browsers.
Test example:
If you have a very wide or very high-res monitor, please try this on a 15" laptop, or narrow your window a bit.
Tested on Win7-64. 'Broken' means no edit link appears at certain string-length/window-width combinations; 'Works' means the edit link appears, and functions correctly:
- Broken on: Safari 5, Opera 63, Chrome 77,
- Works on: IE 11 (wraps at space before paren), Firefox 56 (wraps at slash)
P.S., my default browser is Opera, but I don't see a Browser Support project for it; if there's another Opera-related project, please add it.