printing marks on every staff moves measure number up

[Mark Polesky]

Hi everyone,

I'm referring to the snippet "Printing marks on every staff" found here:
http://lilypond.org/doc/v2.11/Documentation/user/lilypond/Writing-text#Selected-Snippets-35

Printing marks on every staff moves the measure number up.
See test file below and attached image. Is this a bug?

- Mark

______________________________________________________________


\version "2.11.63-1"

music = \relative {
  c'1 c \break c \mark \fermataMarkup c
}

\paper {
  indent = #0
  left-margin = #20
  line-width = #50
}

\score {
  \new StaffGroup
  <<
  \new Staff \music
  \new Staff \music
  >>
  \header {
    piece = "default:"
  }
}

\score {
  \new StaffGroup
  <<
  \new Staff \music
  \new Staff \music
  >>
  \header {
    piece = \markup \column {
      "printing marks on every staff" "moves measure number up:"
    }
  }
  \layout {
    \context {
      \Score
      \remove "Mark_engraver"
      \remove "Staff_collecting_engraver"
    }
    \context {
      \Staff
      \consists "Mark_engraver"
      \consists "Staff_collecting_engraver"
    }
    \context {
      \StaffGroup
      \remove "Span_bar_engraver"
    }
  }
}