bug#55761: 28.1; improvement on doc string

[Ikumi Keita <ikumi@ikumi.que.jp>]

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I'd like to propose the attached patch.

Here is a portion of output of C-h f find-file RET:
,----
| Switch to a buffer visiting file FILENAME,
| [...]
| type M-x next-history-element to pull it into the minibuffer.
| 
| The first time M-x next-history-element is used after Emacs prompts for
| [...]
| current directory to be available on first M-x next-history-element
| request.
`----
The appearances of "M-x next-history-element" don't look nice to me. I
hope the attached patch to be a starting point for revising the doc
strings of `find-file' and its cousins.

Regards,
Ikumi Keita
#StandWithUkraine #StopWarInUkraine


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diff --git a/lisp/files.el b/lisp/files.el
--- a/lisp/files.el
+++ b/lisp/files.el
@@ -1706,7 +1706,7 @@
 
 (defun find-file (filename &optional wildcards)
   "Edit file FILENAME.
-Switch to a buffer visiting file FILENAME,
+\\<minibuffer-local-map>Switch to a buffer visiting file FILENAME,
 creating one if none already exists.
 Interactively, the default if you just type RET is the current directory,
 but the visited file name is available through the minibuffer history:
@@ -1731,7 +1731,7 @@
 expand wildcards (if any) and visit multiple files.  You can
 suppress wildcard expansion by setting `find-file-wildcards' to nil.
 
-To visit a file without any kind of conversion and without
+\\<global-map>To visit a file without any kind of conversion and without
 automatically choosing a major mode, use \\[find-file-literally]."
   (interactive
    (find-file-read-args "Find file: "
@@ -1747,6 +1747,7 @@
 Like \\[find-file] (which see), but creates a new window or reuses
 an existing one.  See the function `display-buffer'.
 
+\\<minibuffer-local-map>\
 Interactively, the default if you just type RET is the current directory,
 but the visited file name is available through the minibuffer history:
 type \\[next-history-element] to pull it into the minibuffer.
@@ -1779,6 +1780,7 @@
 Like \\[find-file] (which see), but creates a new frame or reuses
 an existing one.  See the function `display-buffer'.
 
+\\<minibuffer-local-map>\
 Interactively, the default if you just type RET is the current directory,
 but the visited file name is available through the minibuffer history:
 type \\[next-history-element] to pull it into the minibuffer.

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In GNU Emacs 28.1 (build 1, x86_64-unknown-freebsd13.0, GTK+ Version 3.24.33, cairo version 1.17.4)
 of 2022-05-10 built on freebsd.vmware
Windowing system distributor 'The X.Org Foundation', version 11.0.12014000
System Description: 13.1-RELEASE

Configured using:
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