Who to Follow takes its cue from the page
The suggestion box now takes its cue from the page you're on. Profiles offer people that developer follows. Commit threads offer the people in the thread.
You click through to a developer's profile, and the Who to Follow box in the sidebar changes character. Instead of the usual popular names, it lists people that developer follows. Open a commit thread and the same box lists the developers who replied in it. Three names, as always, each with a follow button.
Credit goes to MrPunyapal, who taught the box to read the page it sits on. On a profile it reads that developer's follow list. On a commit page it walks the thread's replies and quotes, ignoring pending, hidden, muted and blocked ones, and holds up to 15 candidates. It shows three at a time, keeps three spares for dismissals, and fills empty slots from the old network-and-popular mix. Fifteen candidates make five pages, and the sixth refresh wraps to the first trio.
One catch. The line under each name still won't tell you why that person is there. Contextual picks carry a mutual-follower count of zero, so the reason reads "412 followers" rather than "followed by 3 you follow", with no hint that they came from the profile or the thread.