(It does this by creating a specially-named symbolic link@footnote{If
your file system does not support symbolic links, a regular file is
used.} with special contents in the same directory. @xref{File
-Locks,,, elisp} for more details.) Emacs removes the lock when you
+Locks,,, elisp}, for more details.) Emacs removes the lock when you
save the changes. The idea is that the file is locked whenever an
Emacs buffer visiting it has unsaved changes.