bug#14328: buffer cloned with clone-indirect-buffer is refontified with the source, when switching mode

[Stefan Monnier]

> I discovered it when trying to edit an MSBuild file (that's a MSVS
> project).  It is normally an XML, but you can use some C# inside to write
> inline tasks, so I wanted to have a buffer that highlights C# code on one
> side and XML on the other side.

Right, good'ol' multi-major-mode problem.
Using indirect-buffers with it just adds a new problem onto the other.

I don't think we have a good answer yet :-(


        Stefan