Dear Bug Squad
This is the only unreported regression I know about.
It change since 2.12.3, and although I did not get a huge response over
on -user, we agree it got worse.
I believe this tiny example captures what we did not like in the real
music examples from that thread.
% Note spacing should not be affected by accidentals unless necessary.
% Here, spacing is tightened near accidentals
\version "2.13.43"
{
\repeat unfold 8 {f'8 bes' d'' f'' \noBreak }
\break
\repeat unfold 12 {f'8 bes' d'' f'' \noBreak }
}