[clangd][test] Fix -Wmissing-field-initializers in DiagnosticsTests.cpp (NFC)

llvm-project/clang-tools-extra/clangd/unittests/DiagnosticsTests.cpp:921:45:
error: missing field 'Annotations' initializer [-Werror,-Wmissing-field-initializers]
       TextEdit{Main.range("virtual1"), ""}}};
                                            ^
llvm-project/clang-tools-extra/clangd/unittests/DiagnosticsTests.cpp:926:45:
error: missing field 'Annotations' initializer [-Werror,-Wmissing-field-initializers]
       TextEdit{Main.range("virtual2"), ""}}};
                                            ^
2 errors generated.

Author: DamonFool

clang-tools-extra/clangd/unittests/DiagnosticsTests.cpp

@@ -918,12 +918,14 @@ TEST(DiagnosticTest, ClangTidySelfContainedDiagsFormatting) {
       "prefer using 'override' or (rarely) 'final' "
       "instead of 'virtual'",
       {TextEdit{Main.range("override1"), " override"},
-       TextEdit{Main.range("virtual1"), ""}}};
+       TextEdit{Main.range("virtual1"), ""}},
+      {}};
   clangd::Fix const ExpectedFix2{
       "prefer using 'override' or (rarely) 'final' "
       "instead of 'virtual'",
       {TextEdit{Main.range("override2"), " override"},
-       TextEdit{Main.range("virtual2"), ""}}};
+       TextEdit{Main.range("virtual2"), ""}},
+      {}};
   // Note that in the Fix we expect the "virtual" keyword and the following
   // whitespace to be deleted
   EXPECT_THAT(TU.build().getDiagnostics(),