Change arg spacing in mlir tests

Co-authored-by: Jakub Kuderski <[email protected]>

Author: ianayl

mlir/test/Conversion/ArithToSPIRV/arith-to-spirv.mlir

@@ -735,15 +735,15 @@ func.func @index_castui4(%arg0: index) {
 }
 
 // CHECK-LABEL: index_castindexi1_1
-func.func @index_castindexi1_1(%arg0 : index) {
+func.func @index_castindexi1_1(%arg0: index) {
   // CHECK: %[[ZERO:.+]] = spirv.Constant 0 : i32
   // CHECK: spirv.INotEqual %[[ZERO]], %{{.+}} : i32
   %0 = arith.index_cast %arg0 : index to i1
   return
 }
 
 // CHECK-LABEL: index_castindexi1_2
-func.func @index_castindexi1_2(%arg0 : vector<1xindex>) -> vector<1xi1> {
+func.func @index_castindexi1_2(%arg0: vector<1xindex>) -> vector<1xi1> {
   // Single-element vectors do not exist in SPIRV.
   // CHECK: %[[ZERO:.+]] = spirv.Constant 0 : i32
   // CHECK: spirv.INotEqual %[[ZERO]], %{{.+}} : i32
@@ -752,7 +752,7 @@ func.func @index_castindexi1_2(%arg0 : vector<1xindex>) -> vector<1xi1> {
 }
 
 // CHECK-LABEL: index_castindexi1_3
-func.func @index_castindexi1_3(%arg0 : vector<3xindex>) {
+func.func @index_castindexi1_3(%arg0: vector<3xindex>) {
   // CHECK: %[[ZERO:.+]] = spirv.Constant dense<0> : vector<3xi32>
   // CHECK: spirv.INotEqual %[[ZERO]], %{{.+}} : vector<3xi32>
   %0 = arith.index_cast %arg0 : vector<3xindex> to vector<3xi1>