bREPL format

[burningTyger]

I noticed that the bREPL formatting is difficult to read:

cljs.user> (dom/append! (dom/by-id "shoppingForm")
                        "<div class='help'>Click to calculate</div>")
#object[HTMLFormElement [object HTMLFormElement]]

I kept assuming the last line was also meant to be typed ... doesn't really work :)

Nowadays the repl makes use of a multiline prompt that looks like this:

cljs.user=> (dom/append! (dom/by-id "shoppingForm")
       #_=>          "<div class='help'>Click to calculate</div>")
#object[HTMLFormElement [object HTMLFormElement]]

This way it's easier to spot the return value.

Also, I think it's better not to format the bREPL input/output as clj but plain code. If formatted that way markdown assumes it is Syntax and also tries to format the docstrings.