Invalid example for 'Sharing fixtures', 'Composing fixtures by stacking traits'

[hipnoizz]

This section contains example which does not compile under ScalaTest 3.0.0 and 3.0.1.

package org.scalatest.examples.flatspec.composingwithfixture

import org.scalatest._
import collection.mutable.ListBuffer

trait Builder extends SuiteMixin { this: Suite =>

  val builder = new StringBuilder

  abstract override def withFixture(test: NoArgTest) = {
    builder.append("ScalaTest is ")
    try super.withFixture(test) // To be stackable, must call super.withFixture
    finally builder.clear()
  }
}
...

Should it be TestSuiteMixin instead SuiteMixin and TestSuite instead Suite?