[TxMt] Problem using "Run" command in Ruby bundle

[Kenneth McDonald]

Quite possibly something I've messed up myself. When I'm editing a Ruby 
file and I hit command-R to run the file, I get a pop up window called 
'Run' indicating problems. I can't even copy the text from that window 
(it doesn't seem to make it to the clipboard) though the ultimate 
problem appears to be that something is trying to invoke '+' on nil. 
I've a attached a screenshot of the full error report.

Is this a simple, obvious problems? (Well, I mean to people other than 
me :-) ).

Thanks,
Ken


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