[libcxx] [test] Untabify, NFC.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@309464 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/containers/sequences/vector.bool/reference.swap.pass.cpp

@@ -23,17 +23,17 @@ int main()
     bool a[] = {false, true, false, true};
     bool* an = a + sizeof(a)/sizeof(a[0]);
 
-	std::vector<bool> v(a, an);
-	std::vector<bool>::reference r1 = v[0];
-	std::vector<bool>::reference r2 = v[3];
+    std::vector<bool> v(a, an);
+    std::vector<bool>::reference r1 = v[0];
+    std::vector<bool>::reference r2 = v[3];
 
 #if TEST_STD_VER >= 11
     static_assert((noexcept(v.swap(r1,r2))), "");
 #endif
 
-	assert(!r1);
-	assert( r2);
-	v.swap(r1, r2);
-	assert( r1);
-	assert(!r2);
+    assert(!r1);
+    assert( r2);
+    v.swap(r1, r2);
+    assert( r1);
+    assert(!r2);
 }