Description of how to use the curve editor should be moved out of the nodes/texture code and into the UI docs. (only noted once, then referenced elsewhere)
> 1 ./manual/composite_nodes/types/color.rst:25:Click and drag along the curve to create a control point and to change the curve's shape.
> 2 ./manual/materials/nodes/types/color.rst:71:Click and drag along the curve to create a control point and to change the curve's shape.
> 3 ./manual/materials/nodes/types/vector.rst:169:Click and drag along the curve to create a control point and to change the curve's shape.
> 4 ./manual/textures/types/nodes/color.rst:62:Click and drag along the curve to create a control point and to change the curve's shape.