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CylindricalGravity

v19	v20
99	99	This routine is responsible for making changes to the stencil coefficients, for say, ghost zones, or differing geometry. This is where the mods to the stencil for 2.5D geometry will take place.
100	100
	101	Since stencil values is a module wide variable, we should not modify it itself in any routine. Instead, we define a new array, tempStencilValues, set it = !StencilValues, and then modify elements of this new array when necessary.
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	103	The routine begins by
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