feature request: turn partcombine to partCombine (camelCase)

[Malte Meyn]

Hi list,

the case of the ‘c’ in partcombine is inconsistent, confusing me every 
time I use \partcombine(Apart|Chords|…):

\partcombine, \partcombineApart, … but
\partCombineTextsOnNote, \partCombineListener

I would suggest to change all occurences of ‘partcombine’ to ‘partCombine’.

Why not change ‘partCombine’ to ‘partcombine’? Because I looked at the 
engravers which use the more ‘natural’ underscore instead of camelCase 
for spaces. And in the same way as ‘Cue_clef_engraver’ suggests that 
‘cue clef’ are two words (resulting in ‘cueClefGlyph’, not 
‘cueclefGlyph’), ‘Part_combine_engraver’ does.

I think that this would be rather easy to change.

Cheers,
Malte