[clangd] Correct the documentation, NFC.

git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@368277 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/clangd/unittests/TweakTesting.h b/clangd/unittests/TweakTesting.h
index 4d9df72..f79cd5b 100644
--- a/clangd/unittests/TweakTesting.h
+++ b/clangd/unittests/TweakTesting.h
@@ -26,7 +26,7 @@
 //     namespace foo { template<typename> class X{}; }
 //     using namespace foo;
 //   cpp)";
-//   Context = Block;
+//   Context = Function;
 //   EXPECT_THAT(apply("[[auto]] X = foo<int>();"),
 //               "foo<int> X = foo<int();");
 //   EXPECT_AVAILABLE("^a^u^t^o^ X = foo<int>();");