Respell to-barline as to-bar-line

[Trevor Bača]

Hi,

The to-barline property of hairpins and other spanners is incredibly
helpful, and greatly improves the look of my scores. But spelling "barline"
as a single word conflicts with the two-word spelling that appears more
frequently throughout the code, especially in the spelling of the BarLine
grob, with which users interact frequently:

%%% BEGIN %%%

*355 occurrences as two separate words:*

lilypond-2.25.19$ clear; ack --no-filename -o '\b\w*BarLine\w*\b' | sort |
uniq -c
  75 BarLine
   3 currentBarLine
   4 defineBarLine
  16 forbidBreakBetweenBarLines

lilypond-2.25.19$ clear; ack --no-filename -o '\b\w*bar-line\w*\b' | sort |
uniq -c
 254 bar-line
   3 bar-lines

*92 occurrences a compound word:*

lilypond-2.25.19$ clear; ack --no-filename -o '\b\w*Barline\w*\b' | sort |
uniq -c
   7 Barline
   2 cancelBeforeBarline
   6 hairpinToBarline

lilypond-2.25.19$ clear; ack --no-filename -o '\b\w*barline\w*\b' | sort |
uniq -c
   9 add_barline
  49 barline
   4 barline_color
   5 barlines
   6 nobarlines
   4 prev_barline

%%% END %%%

Can the spelling of to-barline be changed to to-bar-line to better match
the rest of the code?

-- 
Trevor Bača
www.trevorbaca.com
soundcloud.com/trevorbaca