std libs collapse doesn't work anymore

[mdinger]

The collapse button at the top right on the std lib docs doesn't work anymore. It should.

[mdinger]

beta doesn't work either.

[Diggsey]

The problem is in "main.js" in the "toggle-all-docs" event handler, which is attempting to use the HTML entities for '+'/'−' in a javascript string. This was likely broken when '[-]' was changed to '[−]'. It should use a unicode escape sequence.

[mohtar]

The pull request has been merged and it looks like the collapse button is working in the nightly docs now. This should be closed.

[mdinger]

Yup