Your bug report

#75806: Trailing spaces; pattern "\s" before "[[:cntrl:]]" faulty

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 75806@debbugs.gnu.org.

-- 
75806: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=75806
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