bug#63643: 29.0.91; compilation/grep -mode-tool-bar-map menu initialization not working

[gerard . vermeulen]

Hi,

after reading the code of the compilation-mode function and the 
grep-mode
definition, I have the expectation that the results of the 
"tool-bar-local-item" calls
in the compilation-mode-tool-bar-map and the grep-mode-tool-bar-map
variable definitions should be append to "Errors" menus of the 
respective modes.

However, this does not happen on my setup which is:
GNU Emacs 29.0.91 (build 1, x86_64-apple-darwin20.6.0, NS appkit-2202.70 
Version 11.7.1 (Build 20G918)) of 2023-05-20

I have a related documentation comment question:
Why are the IMO useful "n" and "p" compilation-mode-map key bindings not
documented in  (Info-goto-node "Compilation Mode")?

Gerard