fix progress bar computation

1 job for master in 36 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
failed #44147
tests

00:00:36

 
Name Stage Failure
failed
tests Test
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l.24 \setsansfont
{LiberationSans}
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Transcript written on minimal.log.
Makefile:15: recipe for target 'xelatex/minimal' failed
make: *** [xelatex/minimal] Error 1
ERROR: Job failed: exit code 1