By the way, here is a simple way to test Magit without installing it in your
Emacs. However, you will need Eldev (external relative to Emacs).

1. Install Eldev (https://github.com/doublep/eldev#installation)

2. Check out Magit sources, e.g. to `~/git/magit'

3. Run `$ cd ~/git/magit/*lisp*' (I don't know why they have this layout)

4. Create file `Eldev-local' with the following contents (since the
project doesn't use Eldev, you have to do this manually):

(setf eldev-project-main-file "magit.el")
(eldev-use-package-archive 'gnu-elpa)
(eldev-use-package-archive 'melpa)

5. Run e.g. like this: `$ eldev emacs --eval "(magit-status-setup-buffer
\"~/emacs\")" ',
assuming `~/emacs' is a Git checkout you work on.

Paul

On Sat, 27 Aug 2022 at 19:01, Paul Pogonyshev <pogonyshev@gmail.com> wrote:

> There is no mode binding (`C-h k C-b' returns `backward-char'). I don't
> know
> how to read this (result of showing the keymap in
> `describe-text-properties'
> buffer; at step 1:
>
> (keymap keymap
>         (3 keymap
>            (5 . magit-diff-edit-hunk-commit)
>            (20 . magit-diff-trace-definition))
>         (67 . magit-commit-add-log)
>         (38 . magit-do-async-shell-command)
>         (117 . magit-unstage)
>         (115 . magit-stage)
>         (97 . magit-apply)
>         (remap keymap
>                (magit-revert-no-commit . magit-reverse)
>                (magit-delete-thing . magit-discard)
>                (magit-visit-thing . magit-diff-visit-file))
>         (24 keymap
>             (97 . magit-add-change-log-entry)
>             (53 keymap
>                 (return . magit-diff-visit-file-other-frame))
>             (52 keymap
>                 (97 . magit-add-change-log-entry-other-window)
>                 (return . magit-diff-visit-file-other-window)))
>         (C-return . magit-diff-visit-worktree-file)
>         (10 . magit-diff-visit-worktree-file))
>
> At step 2:
>
> (keymap
>  (3 keymap
>     (94 keymap
>         (108 . magit-smerge-keep-lower)
>         (98 . magit-smerge-keep-base)
>         (117 . magit-smerge-keep-upper)
>         (13 . magit-smerge-keep-current)))
>  keymap
>  (3 keymap
>     (5 . magit-diff-edit-hunk-commit)
>     (20 . magit-diff-trace-definition))
>  (67 . magit-commit-add-log)
>  (38 . magit-do-async-shell-command)
>  (117 . magit-unstage)
>  (115 . magit-stage)
>  (97 . magit-apply)
>  (remap keymap
>         (magit-revert-no-commit . magit-reverse)
>         (magit-delete-thing . magit-discard)
>         (magit-visit-thing . magit-diff-visit-file))
>  (24 keymap
>      (97 . magit-add-change-log-entry)
>      (53 keymap
>          (return . magit-diff-visit-file-other-frame))
>      (52 keymap
>          (97 . magit-add-change-log-entry-other-window)
>          (return . magit-diff-visit-file-other-window)))
>  (C-return . magit-diff-visit-worktree-file)
>
> Paul
>  (10 . magit-diff-visit-worktree-file))
>
> On Sat, 27 Aug 2022 at 18:56, Eli Zaretskii <eliz@gnu.org> wrote:
>
>> > From: Paul Pogonyshev <pogonyshev@gmail.com>
>> > Date: Sat, 27 Aug 2022 18:32:15 +0200
>> > Cc: Gerd Möllmann <gerd.moellmann@gmail.com>,
>> >       57433@debbugs.gnu.org
>> >
>> > > Now, I put the point at the beginning of the third line ([^] is the
>> point):
>> >
>> > Text content at position 32867:
>> >
>> > There is an overlay here:
>> >  From 32867 to 32901
>> >   evaporate            t
>> >   font-lock-face       magit-diff-file-heading-highlight
>> >
>> > There are text properties here:
>> >   font-lock-face       magit-diff-file-heading
>> >   keymap               [Show]
>> >   magit-section        [Show]
>>
>> Maybe the 'keymap' part?  Could it be that C-b has a binding in that
>> keymap?
>>
>