message: docs: clarify the description of pipes
  This commit clarifies some of the language regarding pipes in the pipes guide.
  This commit also specifies the term transforming rather than formatting.
  PR Close
diff: # Transforming Data Using Pipes
  -Use [pipes](guide/glossary#pipe "Definition of a pipe") to transform and format strings, currency amounts, dates, and other display data.
  -Pipes are simple functions you can use in [template expressions](/guide/glossary#template-expression "Definition of template expression") to accept an input value and return a transformed value.
  +Use [pipes](guide/glossary#pipe "Definition of a pipe") to transform strings, currency amounts, dates, and other data for display.
  +Pipes are simple functions you can use in [template expressions](/guide/glossary#template-expression "Definition of template expression") to accept an input value and return a transformed value. Pipes are useful because you can use them throughout your application, while only declaring each pipe once.
  For example, you would use a pipe to show a date as **April 15, 1988** rather than the raw string format.
  <div class="alert is-helpful">
  @@ -63,7 +63,7 @@ function.
  {@a parameterizing-a-pipe}
  -## Formatting data with parameters and chained pipes
  +## Transforming data with parameters and chained pipes
  Use optional parameters to fine-tune a pipe's output.
  For example, you can use the [`CurrencyPipe`](api/common/CurrencyPipe "API reference") with a country code such as EUR as a parameter.
  