eshell fix for change in return value of `diff' command (bug#10420)

* lisp/eshell/em-unix.el (diff-no-select): Autoload it.
(eshell/diff): Use diff-no-select.

2 files changed, 10 insertions, 2 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index d2ee593c389..e4d4062668d 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,8 @@
+2012-01-05  Glenn Morris  <rgm@gnu.org>
+
+        * eshell/em-unix.el (diff-no-select): Autoload it.
+        (eshell/diff): Use diff-no-select.  (Bug#10420)
+
 2012-01-05  Chong Yidong  <cyd@gnu.org>
 
         * shell.el (shell-dynamic-complete-functions): Revert last change.
diff --git a/lisp/eshell/em-unix.el b/lisp/eshell/em-unix.el
index 21deccb8093..f24180b5c7f 100644
--- a/lisp/eshell/em-unix.el
+++ b/lisp/eshell/em-unix.el
@@ -965,6 +965,8 @@ Show wall-clock time elapsed during execution of COMMAND.")
     ((string-match "[^[:blank:]]" string) string)
     (nil)))
 
+(autoload 'diff-no-select "diff")
+
 (defun eshell/diff (&rest args)
   "Alias \"diff\" to call Emacs `diff' function."
   (let ((orig-args (eshell-stringify-list (eshell-flatten-list args))))
@@ -986,8 +988,9 @@ Show wall-clock time elapsed during execution of COMMAND.")
           (setcdr (last args 3) nil))
         (with-current-buffer
             (condition-case err
-                (diff old new
-                      (nil-blank-string (eshell-flatten-and-stringify args)))
+                (diff-no-select
+                 old new
+                 (nil-blank-string (eshell-flatten-and-stringify args)))
               (error
                (throw 'eshell-replace-command
                       (eshell-parse-command "*diff" orig-args))))