Rehearsal mark and hairpin don't cooperate after line break

[Neil Thornock]

>

%%After the line break, the horizontal space of the rehearsal mark suppresses
the hairpin

\version "2.12.1"
\paper {ragged-right = ##t}

\new Score { c'\< c' c' c' \break \mark \markup {"really really long markup"} c'
c' c' c' c'\! }