Evaluate expressions in comments

[justjoheinz]

Given a declaration like

-- >>> reverseList [1,2,3]
reverseList :: [a] -> [a]
reverseList = foldl (flip (:)) []

the IDE will already diplay an Evalute... or Refresh... "link above the -- >>> line. Normally this would lead to the execution of this statement (in VS Code, emacs) and rendering of the results inside the comment.

The link is displayed but clicking it does nothing.

BTW - excellent work so far, the IntelliJ integration is already really smooth.