* lily/slur-scoring.cc (enumerate_attachments): make stem_extent a

* lily/slur-scoring.cc (enumerate_attachments): make stem_extent a
little wider for attachment calculation. This prevents stem and
slur touching.

* lily/parser.yy (direction_less_char): soft code \< \> \! \( \) (
)

* lily/slur-scoring.cc (score_extra_encompass): check if extra
objects are on boundary column.