'git mergetool' creates '*.orig' backup files in its
default configuration. Mention this in its documentation.
Signed-off-by: David Aguilar <davvid@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This is the default behaviour; the option is provided to
override any configuration settings.
+TEMPORARY FILES
+---------------
+`git mergetool` creates `*.orig` backup files while resolving merges.
+These are safe to remove once a file has been merged and its
+`git mergetool` session has completed.
+
+Setting the `mergetool.keepBackup` configuration variable to `false`
+causes `git mergetool` to automatically remove the backup as files
+are successfully merged.
+
Author
------
Written by Theodore Y Ts'o <tytso@mit.edu>