master a941a9e: ;; Revert recent change in tramp-cache.el

[Michael Albinus]

branch: master
commit a941a9e8c226cff8eb77c4f8d7d0d54cb4a36340
Author: Michael Albinus <address@hidden>
Commit: Michael Albinus <address@hidden>

    ;; Revert recent change in tramp-cache.el
    
    * lisp/net/tramp-cache.el (tramp-dump-connection-properties):
    Remove compatibility code dumping the persistency file.  Use
    `emacs-lisp-mode' for backward compatibility.
---
 lisp/net/tramp-cache.el | 13 ++++---------
 1 file changed, 4 insertions(+), 9 deletions(-)

diff --git a/lisp/net/tramp-cache.el b/lisp/net/tramp-cache.el
index 6d87ce2..14a6438 100644
--- a/lisp/net/tramp-cache.el
+++ b/lisp/net/tramp-cache.el
@@ -472,15 +472,10 @@ used to cache connection properties of the local machine."
        ;; Dump it.
        (with-temp-file tramp-persistency-file-name
          (insert
-          ";; -*- lisp-data -*-"
-          ;; `time-stamp-string' might not exist in all Emacs flavors.
-          (condition-case nil
-              (progn
-                (format
-                 " <%s %s>\n"
-                 (time-stamp-string "%02y/%02m/%02d %02H:%02M:%02S")
-                 tramp-persistency-file-name))
-            (error "\n"))
+          ;; Starting with Emacs 28, we could use `lisp-data'.
+          (format ";; -*- emacs-lisp -*- <%s %s>\n"
+                  (time-stamp-string "%02y/%02m/%02d %02H:%02M:%02S")
+                  tramp-persistency-file-name)
           ";; Tramp connection history.  Don't change this file.\n"
           ";; Run `M-x tramp-cleanup-all-connections' instead.\n\n"
           (with-output-to-string