output, unless the `--stdout` option is specified.
If `-o` is specified, output files are created in <dir>. Otherwise
-they are created in the current working directory.
+they are created in the current working directory. The default path
+can be set with the 'format.outputDirectory' configuration option.
+The `-o` option takes precedence over `format.outputDirectory`.
+To store patches in the current working directory even when
+`format.outputDirectory` points elsewhere, use `-o .`.
By default, the subject of a single patch is "[PATCH] " followed by
the concatenation of lines from the commit message up to the first blank