anchor.diff:  +makeExample('pipes/ts/app/exponential-strength.pipe.ts', null, 'app/exponential-strength.pipe.ts')(format=".")
   
   :marked
  -  This pipe definition reveals several key points
  +  This pipe definition reveals several key points:
   
     * A pipe is a class decorated with pipe metadata.
   
  
positive.code:   We can chain pipes together in potentially useful combinations.
    In the following example, we chain the birthday to the `DatePipe` and on to the `UpperCasePipe`
    so we can display the birthday in uppercase. The following birthday displays as
    **<samp>APR 15, 1988</samp>**
  
  +makeExample('pipes/ts/app/app.component.html', 'chained-birthday')(format=".")
  
  
negative.code: 
    A pipe takes in data as input and transforms it to a desired output.
    We'll illustrate by transforming a component's birthday property into
    a human-friendly date.
  
  +makeExample('pipes/ts/app/hero-birthday1.component.ts', null, 'app/hero-birthday1.component.ts')(format='.')
  
  