[clangd] NFC: Resolve Clang-Tidy warnings in Protocol.cpp

[kbobyrev]

Add forgotten fixes.

clang-tools-extra/clangd/Protocol.cpp

llvm::raw_ostream &operator<<(llvm::raw_ostream &OS, const TextEdit &TE) {
   return OS << '"';
 }
 
 bool fromJSON(const llvm::json::Value &E, TraceLevel &Out, llvm::json::Path P) {
   if (auto S = E.getAsString()) {
     if (*S == "off") {
       Out = TraceLevel::Off;
       return true;
-    } else if (*S == "messages") {
+    }
+    if (*S == "messages") {
       Out = TraceLevel::Messages;
       return true;
-    } else if (*S == "verbose") {
+    }
+    if (*S == "verbose") {
       Out = TraceLevel::Verbose;
       return true;
     }
   }
   return false;
 }
 
 bool fromJSON(const llvm::json::Value &E, SymbolKind &Out, llvm::json::Path P) {
if (auto *Diagnostics = TextDocument->getObject("publishDiagnostics")) {
         R.DiagnosticFixes = *CodeActions;
       if (auto RelatedInfo = Diagnostics->getBoolean("relatedInformation"))
         R.DiagnosticRelatedInformation = *RelatedInfo;
     }
     if (auto *Completion = TextDocument->getObject("completion")) {
       if (auto *Item = Completion->getObject("completionItem")) {
         if (auto SnippetSupport = Item->getBoolean("snippetSupport"))
           R.CompletionSnippets = *SnippetSupport;
-        if (auto DocumentationFormat = Item->getArray("documentationFormat")) {
+        if (const auto *DocumentationFormat =
+                Item->getArray("documentationFormat")) {
           for (const auto &Format : *DocumentationFormat) {
             if (fromJSON(Format, R.CompletionDocumentationFormat, P))
               break;
           }
         }
       }
       if (auto *ItemKind = Completion->getObject("completionItemKind")) {
         if (auto *ValueSet = ItemKind->get("valueSet")) {
const llvm::StringLiteral ExecuteCommandParams::CLANGD_APPLY_TWEAK =
     "clangd.applyTweak";
 
 bool fromJSON(const llvm::json::Value &Params, ExecuteCommandParams &R,
               llvm::json::Path P) {
   llvm::json::ObjectMapper O(Params, P);
   if (!O || !O.map("command", R.command))
     return false;
 
-  auto Args = Params.getAsObject()->getArray("arguments");
+  const auto *Args = Params.getAsObject()->getArray("arguments");
   if (R.command == ExecuteCommandParams::CLANGD_APPLY_FIX_COMMAND) {
     return Args && Args->size() == 1 &&
            fromJSON(Args->front(), R.workspaceEdit,
                     P.field("arguments").index(0));
   }
   if (R.command == ExecuteCommandParams::CLANGD_APPLY_TWEAK)
     return Args && Args->size() == 1 &&
            fromJSON(Args->front(), R.tweakArgs, P.field("arguments").index(0));