[Musicxml Export] - Pedal lines not exported accurately

The attached example shows 4 kinds of pedal lines. But in Musicxml, all are exported the same. The first two are the most common ones, wand the second has an * at the end, without line. The last is a ped-only sign without line. In Musicxml, the second one should set line to "no", and have the sign attribute to "*"; the last one should only have a start type, no stop, and line to no. When I transcribe Brahms' ballades into braille, all pedal lines are converted the same, which is quite misleading, away from the original score. So this should be implemented, at least can set line to no and without end if there's not an "endtext" shown.

Haipeng