\override Beam #'consistent-slope = ##t should be default

[David Kastrup]

commit 1d9a73b13ee576d28c0f41f5b243f2ebb1ff9fcf
Author: Mike Solomon <address@hidden>
Date:   Fri Oct 21 09:03:43 2011 +0200

    Implements consistent beam slopes across line breaks.

says

    To turn on this feature, use \override Beam #'consistent-slope = ##t.

I think that is a mistake: unbroken beams naturally have consistent
slope.  So when breaking a beam across lines, Lilypond already gets to
play with stem lengths to make the broken output strictly better than
the unbroken output was.

The best output might conceivingly be achieved by very slightly relaxing
slope consistency.  As long as we have no button for that, not relaxing
it is a much saner visual choice than totally discarding it.

I would not even offer a settable property for this as long as the only
options are on and off.

-- 
David Kastrup