Arpeggios clash with notes

[Shotaro Funaji]

> I'm not top posting.

When arpeggios are pushed out by accidentals, arpeggios clash with notes.
In this case, using bracketed arpeggio, problem will see notably.

\version "2.13.51"

up = \relative c' { 
        \override PianoStaff.Arpeggio #'stencil = 
#ly:arpeggio::brew-chord-bracket
        \set PianoStaff.connectArpeggios = ##t
        b8 c4\arpeggio
}

down = \relative c' {
        \clef bass
        g8 as4\arpeggio
}

\score {
 \new PianoStaff <<
  \new Staff \up
  \new Staff \down
 >>
}