Typo in admin/pp-groups.php and pt_BR translation files as bonus

Hi Kevin,

I was working on my own translation of Permit Press (2.1.38) when I found a little error in admin/pp-groups.php on line 220:

$msg = sprintf( __( 'To assign roles or exceptions to BuddyPress groups, %1$enter%2$s or %3$spurchase%4$s a support key and install the PP BuddyPress Role Groups plugin.', 'pp' ), '<a href="admin.php?page=pp-settings&pp_tab=install">', '</a>', '<a href="http://presspermit.com/purchase">', '</a>' );

Looking at the first argument you will see that currently there is no s after the $ while the correct form should be %1$s.
I think it was just a typo and in fact I did not faced the error in the front-end until now.

Besides, if you are interested in bundle my Brazilian Portuguese (pt_BR) translation into the next versions, the files are here: http://bit.ly/1gYyEj6

By the way, I recently bought the Pro version (2.1.44) and it’s working fine here with that pt_BR translation.

https://wordpress.org/plugins/press-permit-core/