Your bug report

#37213: Execute set-window-margins.  left-margin-width remains 0.

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 37213@debbugs.gnu.org.

-- 
37213: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=37213
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems