a.icon-before .glyphicon {
  margin-right: .25em;
}
a.icon-after .glyphicon {
  margin-left: .25em;
}
.btn.icon-before .glyphicon {
  margin-left: -0.25em;
  margin-right: .25em;
}
.btn.icon-after .glyphicon {
  margin-left: .25em;
  margin-right: -0.25em;
}