Add a separator line between evaluation outputs to the Output terminal

[PEZ]

When printing results with the Output terminal configured as the output destination, it sometimes gets a bit hard to see where one results ends and another starts. Adding a separating line between between results will aid in this. We could also consider including information about the active repl session, such as session type (clj, cljs for now, but who knows going forward) and namespace, like the prompt in the REPL Window:

Here the suggestion is to put a semicolon in front of the info-line so that if you copy it and paste it somewhere, it will be ignored by the repl.