Re: Please test gub

[Lukas-Fabian Moser]

> > For more than 10 years gub/specs/lilypond.py used /usr/bin/python. 
> > That means that during lilypond-test the system's python interpreter 
> > is used as the interpreter for the musicxml2ly script, not our own 
> > python in target/tools.  At some currently unknown point in time 
> > musicxml2ly became incompatible to our python 2.4. The hidden usage 
> > of the system's python masked that incompatibility.
> >
> > With our python 2.4 musicxml2ly does not barf, it simply produces 
> > garbage that lateron causes lilypond to fail.
The error was introduced when John Gourlay copied changes made by 
Philomelos into the LilyPond git tree in commits

2ab5d80245dcab194daea64ec83ded3ec8252e51
dc90b895668826a09e06ad1ef94e5e90569a870c
da6591bef1cd9c684a9fb98f1563ea40c543ecdd

in February 2016. Since these changes were copied as a bunch, one would 
probably have to delve into Philomelos's git tree or analyze the source 
directly.

If you folks think it would be worth the effort, I could try to do this.

Lukas