Package: emacs-gtk Version: 1:28.2+1-10 I'm not sure whether this is a bug in Emacs or a bug in the grep man page, but since man(1) and 'M-x man' both handle the page fine, I thought I'd start here.
Reproducible with 'emacs -Q' or 'emacs -q'. Installed version of grep is 3.8-5. Entering 'M-x woman RET grep RET' results in an error: Search failed: "\\(\\\\{\\|el[ ]*\\\\}\\)\\|\\( [.']\\)?[ ]*\\\\}[ ]*" Looking in *Messages*, this is preceded by "woman0-if".