message: docs: typo on function name for handleError()
  changed function name `errorHandle()` to `handleError()`
  PR Close
diff: @@ -208,7 +208,7 @@ innocuous result so that the application keeps working.
  #### _handleError_
  -The following `errorHandler()` will be shared by many `HeroService` methods
  +The following `handleError()` will be shared by many `HeroService` methods
  so it's generalized to meet their different needs.
  Instead of handling the error directly, it returns an _error handler_ function to `catchError` that it
  @@ -223,7 +223,7 @@ After reporting the error to console, the handler constructs
  a user friendly message and returns a safe value to the app so it can keep working.
  Because each service method returns a different kind of `Observable` result,
  -`errorHandler()` takes a type parameter so it can return the safe value as the type that the app expects.
  +`handleError()` takes a type parameter so it can return the safe value as the type that the app expects.
  ### Tap into the _Observable_
  