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"Use --format rerun --out features.txt to write out failing
features. You can rerun them with cucumber @rerun.txt."
If 'features.txt' were 'rerun.txt' then it would be more obvious that there is a match between the output of '-f rerun' and the following input through @rerun.txt
It might be nice to indicate which formatters can't be output and which don't follow the usual pattern of outputting to a file
debug - no output
junit - to directory
Fixed by 12ac20e