Fix Bug#31704. Do not merge

* lisp/eshell/esh-proc.el (eshell-gather-process-output): Do not
let `expand-file-name' prefix remote file names with MS Windows
volume letter.

* lisp/net/tramp.el (tramp-eshell-directory-change):
Use `path-separator' as it does eshell.  (Bug#31704)

1 files changed, 3 insertions, 4 deletions

diff --git a/lisp/eshell/esh-proc.el b/lisp/eshell/esh-proc.el
index 94401c5daa5..ee74762193d 100644
--- a/lisp/eshell/esh-proc.el
+++ b/lisp/eshell/esh-proc.el
@@ -279,11 +279,10 @@ See `eshell-needs-pipe'."
             (let ((process-connection-type
                    (unless (eshell-needs-pipe-p command)
                      process-connection-type))
-                  (command (file-local-name command)))
+                  ;; `start-process' can't deal with relative filenames.
+                  (command (file-local-name (expand-file-name command))))
               (apply 'start-file-process
-                     (file-name-nondirectory command) nil
-                     ;; `start-process' can't deal with relative filenames.
-                     (append (list (expand-file-name command)) args))))
+                     (file-name-nondirectory command) nil command args)))
       (eshell-record-process-object proc)
       (set-process-buffer proc (current-buffer))
       (if (eshell-interactive-output-p)