Folks,
The attached GIF shows a console session where a buggy Ruby program is run
and an exception unceremoniously dumped to STDERR.
The difference is that it's syntax highlighted. Ian Macdonald's 'acoc'
does all the heavy lifting; the following entry in my ~/.acoc.conf does
the rest:
# Highlight Ruby source files, etc., when there's an exception.
[ruby/er]
# message and error class
/:\d+:in `.*?': (.*) \((.+)\)\s*$/ bold,red+bold
# file name and line number
/^(?:\s+from)?(.*?):(\d+)/ green+bold,yellow+bold
# method name
/:in `(.*?)'/ cyan+bold
Pretty handy.
'acoc' relies on term-ansicolor and likes to have 'tpty'. I'll try to gem
all these up soon to make them easy to install. I'm sure Mauricio will do
the same for RPA 
Hope this helps, and hope someone will improve it.
Cheers,
Gavin
