+
+@item ediff-keep-tmp-versions
+@vindex @code{ediff-keep-tmp-versions}
+Default is @code{nil}. If @code{t}, the versions of the files being
+compared or merged using operations such as @code{ediff-revision} or
+@code{ediff-merge-revisions} are not deleted on exit. The normal action is
+to clean up and delete these version files.
+