(align-dir ,ly:dir? "Which side to align? @code{-1}: left side,
@code{0}: around center of width, @code{1}: right side.")
(arch-angle ,number? "Turning angle of the hook of a system brace" )
- (arch-height ,ly:dimension ? "Height of the hook of a system brace.")
+ (arch-height ,ly:dimension? "Height of the hook of a system brace.")
(arch-thick ,number? "Thickness of the hook of system brace.")
(arch-width ,ly:dimension? "Width of the hook of a system brace.")
(arpeggio-direction ,ly:dir? "If set, put an