If you would like to make more extensive contributions, see the
@file{CONTRIBUTE} file in the Emacs source tree for information on how
-to be an Emacs developer. That file is distributed as part of source
+to be an Emacs developer. That file is distributed as part of the source
tarball of every released Emacs version, and can also be found on-line
in the @url{https://git.savannah.gnu.org/cgit/emacs.git/tree/CONTRIBUTE,
Emacs on-line source repository}. If you cloned the Emacs repository,