Make the *grep* buffer editable

* lisp/progmodes/compile.el (compilation--update-markers):
Factor out function...
(compilation-next-error-function): ...from here.  Adjust
to use the above.
* lisp/progmodes/grep.el (grep-edit--prepare-buffer)
(grep-edit-mode-map, grep-edit-mode-hook, grep-edit-mode)
(grep-change-to-grep-edit-mode, grep-edit-save-changes): Add
new 'grep-edit-mode' to make the grep results editable like
in 'occur-edit-mode' by using the 'occur' framework.
(grep-mode-map): Bind 'e' to the new command
'grep-change-to-grep-edit-mode'.
* doc/emacs/building.texi (Grep Searching): Update Info
manual to include the above command.
* etc/NEWS: Announce the change.  (Bug#70820)

1 files changed, 10 insertions, 0 deletions

diff --git a/doc/emacs/building.texi b/doc/emacs/building.texi
index bb03d8cf325..4b2f1ed0649 100644
--- a/doc/emacs/building.texi
+++ b/doc/emacs/building.texi
@@ -528,6 +528,16 @@ grep-find-toggle-abbreviation}.  To disable this abbreviation of the
 shell commands, customize the option @code{grep-find-abbreviate} to a
 @code{nil} value.
 
+@findex grep-change-to-grep-edit-mode
+@cindex Grep Edit mode
+@cindex mode, Grep Edit
+  Typing @kbd{e} in the @file{*grep*} buffer makes the buffer writiable
+and enters the Grep Edit mode.  Similar to Occur Edit mode (@pxref{Other
+Repeating Search}), you can edit the matching lines reported by
+@code{grep} and have those changes reflected in the buffer visiting the
+originating file.  Type @kbd{C-c C-c} to leave the Grep Edit mode and
+return to the Grep mode.
+
 @node Flymake
 @section Finding Syntax Errors On The Fly
 @cindex checking syntax