Merge pull request #3684 from ludgerpaehler:patch-1

PiperOrigin-RevId: 417474317
Change-Id: I4c84f59ba272a6bec3f992f7afae36e1c5617fad

Author: copybara-github

docs/primer.md

@@ -274,8 +274,8 @@ First, define a fixture class. By convention, you should give it the name
 class QueueTest : public ::testing::Test {
  protected:
   void SetUp() override {
-     q1_.Enqueue(1);
-     q2_.Enqueue(2);
+     q0_.Enqueue(1);
+     q1_.Enqueue(2);
      q2_.Enqueue(3);
   }