Full width input group on bootstrap 3.1.0 navbar

Question

I\'ve got some troubles with bootstrap v3.1.0. I need to get search bar that will fit entire width of the navbar like this (v3.0.3): http://bootply.com/109727 But it feels like

Answer 1

For Bootstrap 3.3.6, I solved it by using:

.navbar-form .input-group .input-group-btn {
    width: 1%;
}