[racket-dev] [plt] Push #25179: master branch updated

This is really great. I especially like how you can "lock" the docs into
place.

One thing I was confused by is how to activate it. It appears to
activate when I type an identifier standalone. For example, when typing
this into the definitions window, it shows up ($ is the cursor):

  call-with-continuation-prompt$

However, this doesn't work:

  (call-with-continuation-prompt$

but the latter seems more useful, because I'm more likely to type the
identifier in operator position.

It does show up if I complete the expression and then put my cursor
over it, like this:

  (call-with-continuation-prompt$
    (lambda () (+ 1 2)))

Cheers,
Asumu