Change all instances of \partcombine to \partCombine in the reg tests

input/regression/part-combine-force-once.ly

Index: input/regression/part-combine-force-once.ly
diff --git a/input/regression/part-combine-force-once.ly b/input/regression/part-combine-force-once.ly
index 465042786d441222825413f69fe0a076dbd661f6..1181c94ae1b1638733fe8f960c4102ba0d82788b 100644
--- a/input/regression/part-combine-force-once.ly
+++ b/input/regression/part-combine-force-once.ly
@@ -1,7 +1,7 @@
 
 \header {
   texidoc ="Overrides for the part-combiner, affecting only one moment.
-  The @code{partcombine...Once} override applies only to one moment, after which the
+  The @code{partCombine...Once} override applies only to one moment, after which the
   old override -- if any -- is in effect again.
 "
 }
@@ -11,16 +11,16 @@
 \version "2.19.29"
 
 mI = \relative {
-	e'4 e \once \partcombineApart c c |
-	\partcombineApart c \once \partcombineChords e e e |
-	c \once \partcombineUnisono c c c |
-	\partcombineAutomatic \once \partcombineSoloI r2 c4 c |
-	\once \partcombineSoloII R1 |
-	d'2 \once \partcombineChords d4^"1 chord" d|
+	e'4 e \once \partCombineApart c c |
+	\partCombineApart c \once \partCombineChords e e e |
+	c \once \partCombineUnisono c c c |
+	\partCombineAutomatic \once \partCombineSoloI r2 c4 c |
+	\once \partCombineSoloII R1 |
+	d'2 \once \partCombineChords d4^"1 chord" d|
 }
 mII = \relative {
-	c'4 \once \partcombineApart c c c |
-	c c \once \partcombineAutomatic e e |
+	c'4 \once \partCombineApart c c c |
+	c c \once \partCombineAutomatic e e |
 	c c c c |
 	R1 |
 	r2 c4 c |
@@ -28,5 +28,5 @@ mII = \relative {
 }
 
 \score {
-	\new Staff \partcombine \mI \mII
+	\new Staff \partCombine \mI \mII
 }