Live docs not shown for certain operators and functions

[aplavin]

An earlier issue #832 was closed, but at least for me the most recent version of Pluto 0.12.20 still has the same problems with live docs.
After posting that issue I noticed that live docs don't work not only for operators (like : and +=), but also for some objects and functions (specifically, I noticed it for PyPlot package). See screenshots below. Regular julia REPL shows correct docs in all these cases.

: operator:

+= operator:

plt object from PyPlot.jl:

plt.plot function from PyPlot.jl:

[melonedo]

The result is inconsistent with Docs.doc or Docs.getdoc, mayby Pluto does not directly call these functions?

[dralletje]

There are actually two issues:

• Docs from Python are weird (Cannot display docstring of type Text{String} #1239)
• Symbols like += are weird

Both are fixed now