[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

taichi/codegen/llvm/struct_llvm.cpp

@@ -175,8 +175,8 @@ void StructCompilerLLVM::generate_refine_coordinates(SNode *snode) {
         auto prev = tlctx_->get_constant(snode->extractors[i].acc_shape *
                                          snode->extractors[i].shape);
         auto next = tlctx_->get_constant(snode->extractors[i].acc_shape);
-	// Use UDiv/URem instead of SDiv/SRem so that LLVM can optimize them
-	// into bitwise operations when the divisor is a power of two.
+        // Use UDiv/URem instead of SDiv/SRem so that LLVM can optimize them
+        // into bitwise operations when the divisor is a power of two.
         addition = builder.CreateUDiv(builder.CreateURem(l, prev), next);
       }
       auto in = call(&builder, "PhysicalCoordinates_get_val", inp_coords,