[llvm] [NFC][ADT] Format StringRefTest.cpp to fit in 80 columns. (PR #105502)

[Jakub Kuderski via llvm-commits]

================
@@ -1117,7 +1118,8 @@ TEST(StringRefTest, StringLiteral) {
   constexpr StringRef StringRefs[] = {"Foo", "Bar"};
   EXPECT_EQ(StringRef("Foo"), StringRefs[0]);
   EXPECT_EQ(3u, (std::integral_constant<size_t, StringRefs[0].size()>::value));
-  EXPECT_EQ(false, (std::integral_constant<bool, StringRefs[0].empty()>::value));
+  EXPECT_EQ(false,
+            (std::integral_constant<bool, StringRefs[0].empty()>::value));
----------------
kuhar wrote:

```suggestion
  EXPECT_FALSE(std::integral_constant<bool, StringRefs[0].empty()>::value);
```

https://github.com/llvm/llvm-project/pull/105502