Recent isearch changes in eshell

[Colin Baxter]

Recently, isearch in eshell was changed. According to NEWS, the
following will revert the changes:

--8<---------------cut here---------------start------------->8---
(keymap-set eshell-hist-mode-map "M-r"
             #'eshell-previous-matching-input)
(keymap-set eshell-hist-mode-map "M-s"
             #'eshell-next-matching-input)
--8<---------------cut here---------------end--------------->8---

It seems that the above will only work if they are evaluated after
calling eshell, otherwise they give "void variable eshell-hist-mode-map"
error.

Can anyone suggest how I might revert the changes without having to eval
the above keymap-set in a scratch buffer after "M-x eshell <RET>"? I have
tried eval after load in my ~/.emacs but that appears to have no effect.

Thank you.

Colin Baxter.