Line 2300 PRIM_COLOR: tooltip: '[PRIM_COLOR, integer face, vector color, float alpha] integer face – face number or ALL_SIDES vector color – color in RGB <R, G, B> (<0.0, 0.0, 0.0> = black, <1.0, 1.0, 1.0> = white) float alpha – from 0.0 (clear) to 1.0 (solid) (0.0 <= alpha <= 1.0)' This is not valid YAML. A solution would be PRIM_COLOR: tooltip: | [PRIM_COLOR, integer face, vector color, float alpha] integer face – face number or ALL_SIDES vector color – color in RGB <R, G, B> (<0.0, 0.0, 0.0> = black, <1.0, 1.0, 1.0> = white) float alpha – from 0.0 (clear) to 1.0 (solid) (0.0 <= alpha <= 1.0)