Merge pull request #18874 from gkjohnson/remove-extraneous-plus

Remove extraneous + in shadowmap fragment shader chunk

src/renderers/shaders/ShaderChunk/shadowmap_pars_fragment.glsl.js

@@ -146,7 +146,7 @@ export default /* glsl */`
 						  texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, -dy ), shadowCoord.z ),
 						  f.x ),
 					 mix( texture2DCompare( shadowMap, uv + vec2( -dx, 2.0 * dy ), shadowCoord.z ), 
-						  texture2DCompare( shadowMap, uv + + vec2( 2.0 * dx, 2.0 * dy ), shadowCoord.z ),
+						  texture2DCompare( shadowMap, uv + vec2( 2.0 * dx, 2.0 * dy ), shadowCoord.z ),
 						  f.x ),
 					 f.y )
 			) * ( 1.0 / 9.0 );