anchor.diff:  
   It's automatic, and there is nothing to forget.
   
  -Using the Runner
  -~~~~~~~~~~~~~~~~
  +
  +=== Using the Runner
   
   Assuming your tests are in `first_test.c` the typical command to
   build your library using `gcc` would be
  
positive.code: *Cgreen* encourages this approach by making such tests easier to write.
           
  
  The Problem with Streams
  ~~~~~~~~~~~~~~~~~~~~~~~~
              
  How would we test the following code...?
  
  
negative.code: in a suite.
  
  
  ==== Learning Mocks
  
  Working with legacy code and trying to apply TDD, BDD or even simply
  add some unit tests is not easy. You're working with unknown code that
  