Document that "git add" only adds non-ignored files.
Document that "git add" only adds non-ignored files.

Signed-off-by: Santi Béjar <618d5c06931bb914cb25a8dab62e9b51dbfacc2d@gmail.com>
Signed-off-by: Junio C Hamano <dc50d1021234060e53ec42a77d526afa2fe07479@cox.net>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git