Re: Issue 897 in lilypond: key signatures should be inherited by all Voices (no matter their accidental style)

[lilypond]

Comment #6 on issue 897 by address@hidden: key signatures should be  
inherited by all Voices (no matter their accidental style)
http://code.google.com/p/lilypond/issues/detail?id=897

Patch LGTM, and passed `make check'.

My only concern is that we don't really cover accidental styles very well  
in input/regression, so there might be problems waiting to be discovered.   
We only have tests for the more recently added styles (and none of them  
tests the interaction of a particular style with key signatures).