LilyPond uniform-stretching

uniform-stretching and strict-note-spacing usually set to ##t together; setting uniform-stretching = ##t in isolation can cause problems. Here's an example with proportionalNotationDuration but without uniform-stretching.



And here's the same example with uniform-stretching turned on.



The effect shows up only before line breaks and is similar to that described here about strict-note-spacing set to ##t in isolation.