Fixed clang warnings

include/spdlog/async.h

@@ -42,7 +42,7 @@ struct async_factory_impl
         auto &registry_inst = details::registry::instance();
 
         // create global thread pool if not already exists..
-        std::lock_guard<std::recursive_mutex>(registry_inst.tp_mutex());
+        std::lock_guard<std::recursive_mutex> lock(registry_inst.tp_mutex());
         auto tp = registry_inst.get_tp();
         if (tp == nullptr)
         {

include/spdlog/sinks/android_sink.h

@@ -30,8 +30,8 @@ template<typename Mutex>
 class android_sink SPDLOG_FINAL : public base_sink<Mutex>
 {
 public:
-    explicit android_sink(const std::string &tag = "spdlog", bool use_raw_msg = false)
-        : tag_(tag)
+    explicit android_sink(std::string tag = "spdlog", bool use_raw_msg = false)
+        : tag_(std::move(tag))
         , use_raw_msg_(use_raw_msg)
     {
     }

include/spdlog/sinks/ansicolor_sink.h

@@ -84,8 +84,7 @@ public:
     const std::string on_cyan = "\033[46m";
     const std::string on_white = "\033[47m";
 
-    void log(const details::log_msg &msg) SPDLOG_FINAL override
-    {
+    void log(const details::log_msg &msg) SPDLOG_FINAL {
         // Wrap the originally formatted message in color codes.
         // If color is not supported in the terminal, log as is instead.
         std::lock_guard<mutex_t> lock(mutex_);