Your bug report

#40521: 28.0.50; :box attribute in header-line truncates header-line-format text

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

The explanation is attached below, along with your original report.
If you require more details, please reply to 40521@debbugs.gnu.org.

-- 
40521: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=40521
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