// Returns whether $list contains $value
// -------------------------------------------------------------------------------
// @documentation http://sassylists.com/documentation/#contain
// -------------------------------------------------------------------------------
// @alias `include()`
// -------------------------------------------------------------------------------
// @example contain(a b c, a) => true
// @example contain(a b c, z) => false
// -------------------------------------------------------------------------------
// @param $list [List] : list
// @param $value [Literal] : value to look for
// -------------------------------------------------------------------------------
// @return [Boolean]

@function contain($list, $value) {
    @return not not index($list, $value)
}

// Alias
@function include($list, $value) {
    @return contain($list, $value);
}