From: Lars Ingebrigtsen <larsi@gnus.org>
Date: Sun, 23 Jan 2022 12:54:16 +0000 (+0100)
Subject: Make occur edit mode more resilient
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Make occur edit mode more resilient

* lisp/replace.el (occur-engine): Make the prefix read-only so
that it's preserved in edit mode (bug#53419).
---

diff --git a/lisp/replace.el b/lisp/replace.el
index 60e507c6429..dd6e5a42258 100644
--- a/lisp/replace.el
+++ b/lisp/replace.el
@@ -2086,6 +2086,7 @@ See also `multi-occur'."
 				                     ;; (for Occur Edit mode).
 				                     front-sticky t
 						     rear-nonsticky t
+                                                     read-only t
 						     occur-target ,markers
 						     follow-link t
 				                     help-echo "mouse-2: go to this occurrence"))))