Hi Cyril,

quoted

-If the path passed (optional, defaults to '$TST_MNTPOINT') to the 'tst_umount' is
-not mounted (present in '/proc/mounts') it's noop.
+If the path passed (optional, should be full path, defaults to '$TST_MNTPOINT')

                                  ^          ^
				  must     absolute

I used 'should' because the warning, but 'must' is more appropriate.
Fixed and merged.

Kind regards,
Petr