Add ly:one-line-auto-height-breaking

Add ly:one-line-auto-height-breaking

Includes 4 commits:

Changes entry for ly:one-line-auto-height-breaking

Doc: NR 4.3.2 add ly:one-line-auto-height-breaking
  Includes a few related edits to NR 4.3.2
  mainly for ly:one-line-breaking

Add regtest for ly:one-line-auto-height-breaking

Add ly:one-line-auto-height-breaking

[pwm, 2016-01-14 05:27:19]

Please review, thanks.
-Paul

[lemzwerg, 2016-01-14 06:14:51]

LGTM

[git, 2016-01-18 12:43:54]

This is a great enhancement.

I commented on one typo, but I saw two issues (I'll add images to the
lilypond-devel copy of this message as soon as it pops up):

1)
In one file the instrument name was severely truncated

2)
In another file with three staves (staff + piano staff) the vertical spacing of
the systems is unusably large.

https://codereview.appspot.com/284240043/diff/1/Documentation/notation/spacin...
File Documentation/notation/spacing.itely (right):

https://codereview.appspot.com/284240043/diff/1/Documentation/notation/spacin...
Documentation/notation/spacing.itely:895: @code{ly:one-line-breaking},
@code{ly:one-line-auto-height-page-breaking},
I think this should read "ly:one-line-auto-height-breaking"

[paul_paulwmorris.com, 2016-01-18 15:17:46]

> On Jan 18, 2016, at 7:43 AM, git@ursliska.de wrote:
> 
> This is a great enhancement.

Thanks Urs.

> I commented on one typo, but I saw two issues (I'll add images to the
> lilypond-devel copy of this message as soon as it pops up):
> 
> 1)
> In one file the instrument name was severely truncated
> 
> 2)
> In another file with three staves (staff + piano staff) the vertical
> spacing of the systems is unusably large.

How do these compare with ly:one-line-breaking ?  (I might try this myself but I
don’t have the .ly files you’re using to test.)  The results should be the same
for both since there’s nothing in this patch that should affect this kind of
spacing.  It should simply produce the same results as ly:one-line-breaking and
then set the height of the page to fit.

So I think changing this kind of spacing behavior would be a separate issue that
would also apply to ly:one-line-breaking.  (Of course users can always change
the spacing settings to get their desired results.)

>
https://codereview.appspot.com/284240043/diff/1/Documentation/notation/spacin...
> File Documentation/notation/spacing.itely (right):
> 
>
https://codereview.appspot.com/284240043/diff/1/Documentation/notation/spacin...
> Documentation/notation/spacing.itely:895: @code{ly:one-line-breaking},
> @code{ly:one-line-auto-height-page-breaking},
> I think this should read "ly:one-line-auto-height-breaking”

Yep, good catch, thanks!

[pwm, 2016-01-19 02:57:13]

a few documentation edits

[pwm, 2016-01-19 03:43:00]

A few doc edits. -Paul

https://codereview.appspot.com/284240043/diff/1/Documentation/notation/spacin...
File Documentation/notation/spacing.itely (right):

https://codereview.appspot.com/284240043/diff/1/Documentation/notation/spacin...
Documentation/notation/spacing.itely:895: @code{ly:one-line-breaking},
@code{ly:one-line-auto-height-page-breaking},
On 2016/01/18 12:43:54, git wrote:
> I think this should read "ly:one-line-auto-height-breaking"

Done.