convert indentation to spaces

assets/shader/basic.slang

@@ -17,7 +17,7 @@ struct VertexShaderOutput {
 };
 
 struct PixelShaderOutput {
-	float4 color : SV_TARGET;
+    float4 color : SV_TARGET;
 };
 
 [shader("vertex")]
@@ -45,9 +45,9 @@ Sampler2D<float4> tex1;
 
 [shader("pixel")]
 PixelShaderOutput main_fragment(VertexShaderOutput input) {
-	PixelShaderOutput output;
+    PixelShaderOutput output;
 
-	output.color = tex1.Sample(float2(input.uv));
-	
-	return output;
+    output.color = tex1.Sample(float2(input.uv));
+    
+    return output;
 }

assets/shader/world.slang

@@ -16,7 +16,7 @@ struct VertexShaderOutput {
 };
 
 struct PixelShaderOutput {
-	float4 color : SV_TARGET;
+    float4 color : SV_TARGET;
 };
 
 [[vk::binding(0, 0)]]
@@ -77,9 +77,9 @@ Sampler2D<float4> tex1;
 
 [shader("fragment")]
 PixelShaderOutput main_fragment(VertexShaderOutput input) {
-	PixelShaderOutput output;
+    PixelShaderOutput output;
 
-	output.color = tex1.Sample(float2(input.uv));
-	
-	return output;
+    output.color = tex1.Sample(float2(input.uv));
+    
+    return output;
 }