Relace remaining const char* with string_view_t in the API

include/spdlog/logger-inl.h

@@ -58,7 +58,7 @@ SPDLOG_INLINE void swap(logger &a, logger &b)
     a.swap(b);
 }
 
-SPDLOG_INLINE void logger::log(source_loc loc, level::level_enum lvl, const char *msg)
+SPDLOG_INLINE void logger::log(source_loc loc, level::level_enum lvl, string_view_t msg)
 {
     if (!should_log(lvl))
     {
@@ -67,7 +67,7 @@ SPDLOG_INLINE void logger::log(source_loc loc, level::level_enum lvl, const char
 
     try
     {
-        details::log_msg log_msg(loc, string_view_t(name_), lvl, string_view_t(msg));
+        details::log_msg log_msg(loc, string_view_t(name_), lvl, msg);
         sink_it_(log_msg);
     }
     catch (const std::exception &ex)
@@ -80,7 +80,7 @@ SPDLOG_INLINE void logger::log(source_loc loc, level::level_enum lvl, const char
     }
 }
 
-SPDLOG_INLINE void logger::log(level::level_enum lvl, const char *msg)
+SPDLOG_INLINE void logger::log(level::level_enum lvl, string_view_t msg)
 {
     log(source_loc{}, lvl, msg);
 }

include/spdlog/logger.h

@@ -97,8 +97,8 @@ public:
         log(source_loc{}, lvl, fmt, args...);
     }
 
-    void log(source_loc loc, level::level_enum lvl, const char *msg);
-    void log(level::level_enum lvl, const char *msg);
+    void log(source_loc loc, level::level_enum lvl, const string_view_t msg);
+    void log(level::level_enum lvl, string_view_t msg);
 
     template<typename... Args>
     void trace(string_view_t fmt, const Args &... args)