Today I was trying to verify which lines of output from jbang were standard out and which is standard error to write a better karate based test.
Reminded me I needed it before and found I had hilite
installed.
A tool that does nothing than highlight standard error in red.
So now instead of:

I get:

Clearly verifing that indeed the error is on standard error. Letting
me add the last test to relase JBang 0.89.1.
On OSX I got hilite
by using brew install hilite
.
Have fun!