Improved sequence diagram message comment formatting

src/util/util.h

@@ -167,6 +167,8 @@ std::string get_os_name();
 std::vector<std::string> split(
     std::string str, std::string_view delimiter, bool skip_empty = true);
 
+std::vector<std::string> split_isspace(std::string str);
+
 /**
  * @brief Remove and erase elements from a vector
  *
@@ -424,4 +426,6 @@ std::string path_to_url(const std::filesystem::path &p);
 std::filesystem::path ensure_path_is_absolute(const std::filesystem::path &p,
     const std::filesystem::path &root = std::filesystem::current_path());
 
+std::string format_message_comment(const std::string &c, unsigned width = 25);
+
 } // namespace clanguml::util