When you have a complex formula with many functions it is useful to introduce newlines and indent so that users can visually see the structure.
| $index | $item |,
uno, due, tre
Which renders as the follows (test case) :
See also related Item7552
: Allow newlines in triple-quoted strings.
This is now in SVN trunk and 6.0 branch; released in Plugins web as well.
NOTE: No change in white-space is done if there are no newlines. This enhancement is compatible with the existing behavior, e.g. it should not break existing code.