Hi Junio,

On Fri, Feb 24, 2017 at 11:28:58AM -0800, Junio C Hamano wrote:

 * Use of an empty string that is used for 'everything matches' is
   still warned and Git asks users to use a more explicit '.' for that
   instead.  The hope is that existing users will not mind this
   change, and eventually the warning can be turned into a hard error,
   upgrading the deprecation into removal of this (mis)feature.  That
   is not scheduled to happen in the upcoming release (yet).

FWIW '.' is not equivalent to '' when it comes to grep or such commands,
you should suggest '^' or '$' instead, otherwise you'll miss empty lines
and users will continue to use '' for that purpose. BTW I do use grep ''
a lot, but only on file systems, not within git (eg: to display contents
of /sys).

Cheers,
Willy