bug#42310: 28.0.50; Typo in docstring for eldoc-documentation-functions

[James N. V. Cash]

There seems to be a typo in the documentation for
eldoc-documentation-functions ("berlow" for "below"); very small patch
below.

In GNU Emacs 28.0.50 (build 2, x86_64-pc-linux-gnu, GTK+ Version 3.22.30, cairo 
version 1.15.10)
 of 2020-07-09 built on gonk
Repository revision: 19cf8e5be7c1b02dbc0831d8b64560533a59587c

--- a/lisp/emacs-lisp/eldoc.el
+++ b/lisp/emacs-lisp/eldoc.el
@@ -372,7 +372,7 @@ eldoc-documentation-functions

 - If that decision can be taken quickly, the hook function may
   call CALLBACK immediately following the protocol described
-  berlow.  Alternatively it may ignore CALLBACK entirely and
+  below.  Alternatively it may ignore CALLBACK entirely and
   return either the doc string, or nil if there's no doc
   appropriate for the context.