bug: multiple pipes moved to one-line after optimization

## Versions

* Styler: 1.0-rc2

## Example Input

```elixir
# this
comment_entries_str =	      
  a	                
  |> Enum.with_index()	
  |> Enum.map(&b(c, &1))	
  |> Enum.join()	
# became
comment_entries_str =
  a |> Enum.with_index() |> Enum.map_join(&b(c, &1))
```

## Stacktrace / Current Behaviour

each should remain on their own line
