#5123 Improve elbowed-hairpin

[Thomas Morley]

Improve elbowed-hairpin

Let the lines be printed by the new make-connected-line-procedure,
using ly:line-interface::line. The new stencil now reacts on
overrides for style and dash-period/fraction.
Not closing Hairpins created by elbowed-hairpin are possible now.
Single disadvantage: The point-list needs to have (0 . 0) first,
if a closing Hairpin is wished.
The previous used make-connected-path did that automatically and
thus was not flexible enough.

Give the final stencil proper extents.

Cleanup, more descriptive naming, extent docstring.

http://codereview.appspot.com/324800043

[Anonymous]

Passes make, make check and a full make doc.

[Thomas Morley]

Adressing David N's comments, extend docstring

http://codereview.appspot.com/324800043

[Anonymous]

Passes make, make check and a full make doc.

[Anonymous]

Patch on countdown for April 30th.

[Anonymous]

Patch counted down - please push.

[Thomas Morley]

pushed to staging as:

commit 605634765732eab978057b8a1af7efe641c81049
Author: Thomas Morley thomasmorley65@gmail.com
Date: Sat Apr 22 19:48:13 2017 +0200

Issue 5123 Improve elbowed-hairpin

Let the lines be printed by the new make-connected-line-procedure,
using ly:line-interface::line. The new stencil now reacts on
overrides for style and dash-period/fraction.
Not closing Hairpins created by elbowed-hairpin are possible now.
Single disadvantage: The point-list needs to have (0 . 0) first,
if a closing Hairpin is wished.
The previous used make-connected-path did that automatically and
thus was not flexible enough.

Give the final stencil proper extents.

Cleanup, more descriptive naming, extent docstring.