anchor.diff:  }
   -----------------------------
   
  -A test is denoted by the *Ensure*. You can consider it having a 'void
  -(void)' signature. You add the test to your suite using
  +A test is denoted by the macro *Ensure*. You can think of a test as
  +having a 'void (void)' signature. You add the test to your suite using
   'add_test()'.
   
   On compiling and running, we now get the output...
  
positive.code: int split_words(char *sentence);
  -------------------------------
  
  ...and to get the code to link we need a stub function in 'words.c'...
  
  [source,c]
  -------------------------------
  
negative.code: suites of test cases can be included in the 'main()' runner file.
  This makes it less work to add more tests.
  
  Here is the, so far empty, test case in +words_test.c+...
  
  [source,c]
  -------------------------------
  