Broken horizontal brackets do not avoid treble clef

[Mike Solomon]

\version "2.19"

% broken horizontal bracket intersects with bottom of treble clef

\score {
  \new Staff \relative c' {
    f1\startGroup f \break
    f f\stopGroup
  }
  \layout {
    \context {
      \Voice
      \consists "Horizontal_bracket_engraver"
      \remove "Forbid_line_break_engraver"
    }
  }
}

% broken horizontal bracket intersects with top of treble clef

\score {
  \new Staff \relative c' {
    \override HorizontalBracket.direction = #UP
    f1\startGroup f \break
    f f\stopGroup
  }
  \layout {
    \context {
      \Voice
      \consists "Horizontal_bracket_engraver"
      \remove "Forbid_line_break_engraver"
    }
  }
}