[clangd][test] Fix build error of FeatureModulesTests

[TaoPan]

Summary

clang-tools-extra/clangd/unittests/FeatureModulesTests.cpp:33:58: error:
could not convert ‘(const char*)""’ from ‘const char*’ to
llvm::StringLiteral’

llvm::StringLiteral kind() const override { return ""; };

[TaoPan]

Hi sammccall,

FeatureModulesTests.cpp was added by D98498, could you please have a review?

[kadircet]

thanks, lgtm! which compiler is this btw?

[TaoPan]

In D100612#2693949, @kadircet wrote:

thanks, lgtm! which compiler is this btw?

Thanks! I used gcc version 5.4.0 on Ubuntu 16.04

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

TEST(FeatureModulesTest, ContributesTweak) {
   struct TweakContributingModule final : public FeatureModule {
     struct ModuleTweak final : public Tweak {
       const char *id() const override { return TweakID; }
       bool prepare(const Selection &Sel) override { return true; }
       Expected<Effect> apply(const Selection &Sel) override {
         return error("not implemented");
       }
       std::string title() const override { return id(); }
-      llvm::StringLiteral kind() const override { return ""; };
+      llvm::StringLiteral kind() const override {
+        return llvm::StringLiteral("");
+      };
     };
 
     void contributeTweaks(std::vector<std::unique_ptr<Tweak>> &Out) override {
       Out.emplace_back(new ModuleTweak);
     }
   };
 
   FeatureModuleSet Set;