[clang] [test] [NFC] Eliminate some hard tabs in tests

"cxx2b-consteval-if.cpp" was showing up misindented.

clang/test/SemaCXX/cxx2b-consteval-if.cpp

@@ -19,9 +19,9 @@ constexpr auto h() {
 constexpr auto i() {
   if consteval {
     if consteval { // expected-warning {{consteval if is always true in an immediate context}}
-	  return 1;
-	}
-	return 2;
+      return 1;
+    }
+    return 2;
   } else {
     return 1.0; // expected-error {{'auto' in return type deduced as 'double' here but deduced as 'int' in earlier return statement}}
   }

clang/test/SemaCXX/typo-correction-cxx17.cpp

@@ -2,6 +2,6 @@
 
 namespace decomp_decl {
 void f() {
-	auto [this_is_a_typo] = this_is_a_typp(); // expected-error{{use of undeclared identifier 'this_is_a_typp'}}
+  auto [this_is_a_typo] = this_is_a_typp(); // expected-error{{use of undeclared identifier 'this_is_a_typp'}}
 }
 }

clang/test/SemaCXX/warn-static-function-inheader.cpp

@@ -7,6 +7,6 @@ static void another(void) { // expected-warning {{function 'another' is not need
 
 template <typename T>
 void foo(void) {
-        thing();
-	another();
+  thing();
+  another();
 }