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 60e507c6429b578c2c39bd7131127d4991b21da3..dd6e5a42258ae8aa43510c03eecac768fe6c6184 100644 (file)
--- 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"))))