Your bug report

#76853: M-b not navigating to the previous word in the prompt string inside Eshell on emacs 30.1

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 76853@debbugs.gnu.org.

-- 
76853: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=76853
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