statistics are given in STDERR not STDOUT

[satmandu]

Running git-restore-mtime gives something like this:

Statistics:
         2.28 seconds
       61,827 log lines processed
        7,790 commits evaluated
           54 directory update errors
           34 directories updated
        7,758 files
        3,609 file update errors
        4,149 files updated

However, doing git-restore-mtime 2>/dev/null to discard STDERR gives no output.

The statistics should not be hidden there.