diff --git a/include/spdlog/common.h b/include/spdlog/common.h
index 5e7e1f78..77744810 100644
--- a/include/spdlog/common.h
+++ b/include/spdlog/common.h
@@ -94,7 +94,7 @@ static const char *level_names[] SPDLOG_LEVEL_NAMES;
 
 static const char *short_level_names[]{"T", "D", "I", "W", "E", "C", "O"};
 
-inline const char *to_str(spdlog::level::level_enum l)
+inline const char *to_c_str(spdlog::level::level_enum l)
 {
     return level_names[l];
 }
diff --git a/include/spdlog/details/fmt_helper.h b/include/spdlog/details/fmt_helper.h
index 9f356a7d..b55bfb9b 100644
--- a/include/spdlog/details/fmt_helper.h
+++ b/include/spdlog/details/fmt_helper.h
@@ -10,7 +10,7 @@ namespace details {
 namespace fmt_helper {
 inline void append_str(const std::string &str, fmt::memory_buffer &dest)
 {
-    const char *str_ptr = str.data();
+    auto *str_ptr = str.data();
     dest.append(str_ptr, str_ptr + str.size());
 }
 
diff --git a/include/spdlog/details/pattern_formatter_impl.h b/include/spdlog/details/pattern_formatter_impl.h
index 942421eb..611d7363 100644
--- a/include/spdlog/details/pattern_formatter_impl.h
+++ b/include/spdlog/details/pattern_formatter_impl.h
@@ -47,7 +47,7 @@ class level_formatter : public flag_formatter
 {
     void format(const details::log_msg &msg, const std::tm &, fmt::memory_buffer &dest) override
     {
-        fmt_helper::append_c_str(level::to_str(msg.level), dest);
+        fmt_helper::append_c_str(level::to_c_str(msg.level), dest);
     }
 };
 
@@ -390,7 +390,7 @@ class i_formatter SPDLOG_FINAL : public flag_formatter
 {
     void format(const details::log_msg &msg, const std::tm &, fmt::memory_buffer &dest) override
     {
-        // fmt::format_to(dest, "{:06}", msg.msg_id);
+
         fmt_helper::pad6(msg.msg_id, dest);
     }
 };
@@ -509,7 +509,7 @@ class full_formatter SPDLOG_FINAL : public flag_formatter
         dest.push_back('[');
         // wrap the level name with color
         msg.color_range_start = dest.size();
-        fmt_helper::append_c_str(level::to_str(msg.level), dest);
+        fmt_helper::append_c_str(level::to_c_str(msg.level), dest);
         msg.color_range_end = dest.size();
         dest.push_back(']');
         dest.push_back(' ');