mke2fs: document stripe_width, not stripe-width

For consistency with other multi-word options, document the extended
option stripe_width instead of stripe-width.  This also avoids the
complexity of parsing options that have an embedded '-'.

Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
1 file changed