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@@ -248,7 +248,9 @@ for documentation errors before submitting a patch.
** Test your changes.
Please test your changes before committing them or sending them to the
-list.
+list. If possible, add a new test along with any bug fix or new
+functionality you commit (of course, some changes cannot be easily
+tested).
Emacs uses ERT, Emacs Lisp Regression Testing, for testing. See (info
"(ert)") or https://www.gnu.org/software/emacs/manual/html_node/ert/