[Emacs] Fix eshell clear alias

org/config/emacs.org

@@ -3297,6 +3297,7 @@ though.
   <<eshell-alias-file>>
   <<eshell-concat-shell-command>>
   <<eshell-alias-open>>
+  <<eshell-alias-clear>>
   <<eshell-alias-buffers>>
   <<eshell-alias-emacs>>
   <<eshell-alias-mkcd>>
@@ -3350,7 +3351,8 @@ window.
 The default behavior of ~eshell/clear~ is not great at all, although it
 clears the screen it also scrolls all the way down. Therefore, let’s
 alias it to ~eshell/clear-scrollback~ which has the correct behavior.
-#+begin_src emacs-lisp
+#+name: eshell-alias-clear
+#+begin_src emacs-lisp :tangle no
 (defalias 'eshell/clear #'eshell/clear-scrollback)
 #+end_src