Improve function that finds the reason why test was skipped, the old version only looked at the ast line, but there might be some additional debug info there so it's better to scan the whole file.  There should be only one line that says "reason: <reason>"
Improve function that finds the reason why test was skipped, the old version only looked at the ast line, but there might be some additional debug info there so it's better to scan the whole file. 
There should be only one line that says "reason: <reason>"

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