Maj7 strangeness 1.4.13

[Bruce McIntyre]

Hello. I'm one of the many struggling with jazz chords.

I'm a tad confused because lilypond seems to mangle maj7 chords when
the base note of the chord is sharp:

g4:maj   =   gmaj7 or g (triangle)    -good
gis4:maj =   g#8  or  g# maj7/8 ? or g#7 6135maj78  -- arrgh!

see attached example:

-- 
Bruce McIntyre.

\version "1.4.13"
\include "paper16.ly"

accompaniment =\chords {
      g4:maj gis4:maj ges4:maj
      a4:maj ais4:maj aes4:maj 
      }

\score {
        \notes < 
                \context ChordNames = banter \accompaniment
                \context ChordNames = american {   
                        \property ChordNames.ChordName \override #'style = #'american 
\accompaniment
                        }   
        \context ChordNames = jazz {
                \property ChordNames.ChordName \override #'style = #' jazz 
\accompaniment
                }
        \context Staff \transpose c'' \accompaniment 
        >
        \paper {
                %\indent = 1.0 \cm
                %\linewidth = 15.0 \cm
                } 
}