Support extended help?

[cormullion]

Just wondering whether support for extended help (JuliaLang/julia#34226) would be nice - some of those doc strings are getting pretty long! :)

[bkamins]

Sure - this is really a good idea.
Would you care to make a PR? If you do not have time I can do it.

[cormullion]

I’ll give it a go later this week...