Fix TOC patching for pydoctor

[hynek]

@Kapeli can you verify this fixes #132 please?

[Kapeli]

No 😢. It adds the TOC anchors into the page's sidebar.

This seems to work:

or soup.find("a", {"name": anchor})

[hynek]

Hmm that makes me a tiny bit nervous … how about or soup.find("a", {"name": name}) (as just pushed).

[Kapeli]

Works! ❤️

[hynek]

Awesome, thanks!

It might take a moment until 3.1, because I want to do #130, #129, and #128 (whatever that is) and releasing now is a PITA thanks to the brew tap and binaries. But you seem comfortable running it from main. 😇