fret diagram alignment

[Sacha Standen]

Hi

I think this may be a bug:

If you change the alignment of a fret diagram, the top horizontal bar on the 
diagram ceases to be bold, as in the 2nd bar below:


%%%%%%%%%%

\version "2.6.1"

{
\override TextScript #'extra-offset = #'(1 . 1)
e'1^\markup 
{ \fret-diagram #"6-1;5-x;4-2;3-2;2-o;1-x;" }

\override TextScript #'extra-offset = #'(1 . 0)
e'1^\markup 
{ \fret-diagram #"6-1;5-x;4-2;3-2;2-o;1-x;" }
}

%%%%%%%%%%


Regards

Sacha