footable_bootstrap.css in FooTable 7.2

.fooicon-collapsed-plus .fooicon-plus:before,
.fooicon-expanded-plus .fooicon-minus:before {
  content: "\002b";
}

.fooicon-collapsed-minus .fooicon-plus:before,
.fooicon-expanded-minus .fooicon-minus:before {
  content: "\2212";
}

.fooicon-collapsed-plus-circle .fooicon-plus:before,
.fooicon-expanded-plus-circle .fooicon-minus:before {
  content: "\e081";
}

.fooicon-collapsed-minus-circle .fooicon-plus:before,
.fooicon-expanded-minus-circle .fooicon-minus:before {
  content: "\e082";
}

.fooicon-collapsed-chevron-left .fooicon-plus:before,
.fooicon-expanded-chevron-left .fooicon-minus:before {
  content: "\e079";
}

.fooicon-collapsed-chevron-right .fooicon-plus:before,
.fooicon-expanded-chevron-right .fooicon-minus:before {
  content: "\e080";
}

.fooicon-collapsed-chevron-up .fooicon-plus:before,
.fooicon-expanded-chevron-up .fooicon-minus:before {
  content: "\e113";
}

.fooicon-collapsed-chevron-down .fooicon-plus:before,
.fooicon-expanded-chevron-down .fooicon-minus:before {
  content: "\e114";
}