Implement MeasureAttachedSpanner (issue 571180043 by address@hidden)

[lemzwerg]

LGTM from reading the code without testing.  Thanks!


https://codereview.appspot.com/571180043/diff/565230043/input/regression/measure-spanner.ly
File input/regression/measure-spanner.ly (right):

https://codereview.appspot.com/571180043/diff/565230043/input/regression/measure-spanner.ly#newcode5
input/regression/measure-spanner.ly:5: Measure attached spanners can
span single and multiple
Shouldn't this be rather

  Measure-attached spanners ...

?

https://codereview.appspot.com/571180043/diff/565230043/lily/measure-attached-spanner.cc
File lily/measure-attached-spanner.cc (right):

https://codereview.appspot.com/571180043/diff/565230043/lily/measure-attached-spanner.cc#newcode96
lily/measure-attached-spanner.cc:96: }
The `}' is not aligned with `{'.  Maybe incorrect use of tabs?

https://codereview.appspot.com/571180043/diff/565230043/scm/define-music-types.scm
File scm/define-music-types.scm (right):

https://codereview.appspot.com/571180043/diff/565230043/scm/define-music-types.scm#newcode313
scm/define-music-types.scm:313:
In case this a hard line break between `measure-' and `attached', please
avoid it (and do the line break before `measure-').

https://codereview.appspot.com/571180043/diff/565230043/scm/scheme-engravers.scm
File scm/scheme-engravers.scm (right):

https://codereview.appspot.com/571180043/diff/565230043/scm/scheme-engravers.scm#newcode172
scm/scheme-engravers.scm:172: This engraver creates spanners bounded by
the columns which start and
s/which/that/

https://codereview.appspot.com/571180043/