Your bug report

#16544: Optimazation for is_mb_middle

which was filed against the grep package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 16544@debbugs.gnu.org.

-- 
16544: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=16544
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