🚀 go-pugleaf

I couldn't find any mention of shell-prompt-pattern, though I did
get enough to discover that I could set comint-prompt-regexp in
~/.emacs_csh to achieve the desired effect.  

I suggest changing 
Node: History References (<- Shell History <- Shell <- Emacs/top) 
to mention shell-prompt-pattern rather than comint-prompt-regexp.

The remainder is all asides:

A certain logic wants to rename the variable to shell-prompt-regexp or
all of the shell-(pushd|popd|cd)-regexp variables to shell-...-pattern
rather than having this mixture of -regexp and -pattern.  Personally, I
prefer pattern as being a real word ;^)

By the by ... apropos help (C-h a) doesn't help with variables.
I wish it did.  Likewise, I wish there were a C-h C-v.

And ... the mechanism which makes ~/.emacs_csh relevant appears to
be divertable using shell-mode-hook provided I can work out how to
ask, from inside a hooked function, what shell's currently in use.
This seems a neater way to do things and would be worth documenting.

Have fun,

	Eddy.