Return nil as coverage instead of a File objectzj-fix-coverage-bug

Given a valid pipeline job, and a regex which wouldn't match to a jobs
trace, the stream of the trace would return the File object. This was
not the case when it matched a value, as that would have been return
from the block.

Now the `extract_coverage` method returns `nil` if no match was found.

0 files changed, 0 insertions, 0 deletions