refactor: phase 0 & 1

include/util.hpp

@@ -24,9 +24,7 @@
  *         reasonable ways as different from the original version.
  */
 
-#ifndef UTIL_HPP
-#define UTIL_HPP
-
+#pragma once
 #include "account.hpp"
 #include "common.hpp"
 #include "io.hpp"
@@ -50,4 +48,4 @@ namespace StringUtils {
     std::string elide(const std::string& s, size_t maxChars);
 }
 
-#endif
+