On &action=history page, when you edit a section, the link to a section is as small as → character. But such a small link is not convenient at all. On mobile it could be ok, but on large resolution PC screens that one character could be really small and unnoticeable. We want to link the entire section name instead of just the arrow.
The code that you'll need to modify is in Linker::formatAutocomments(). There are also test cases that will need updating in LinkerTest.php.