Replace all include guards by #pragma once

It’s $CURRENT_YEAR

src/bridge/bridge.hpp

@@ -1,5 +1,5 @@
-#ifndef BRIDGE_INCLUDED
-# define BRIDGE_INCLUDED
+#pragma once
+
 
 #include <irc/irc_message.hpp>
 #include <irc/irc_client.hpp>
@@ -290,4 +290,4 @@ struct IRCNotConnected: public std::exception
   const std::string hostname;
 };
 
-#endif // BRIDGE_INCLUDED
+

src/bridge/colors.hpp

@@ -1,5 +1,5 @@
-#ifndef COLORS_INCLUDED
-# define COLORS_INCLUDED
+#pragma once
+
 
 /**
  * A module handling the conversion between IRC colors and XHTML-IM, and
@@ -53,4 +53,4 @@ static const char irc_format_char[] = {
  */
 Xmpp::body irc_format_to_xhtmlim(const std::string& str);
 
-#endif // COLORS_INCLUDED
+

src/bridge/list_element.hpp

@@ -1,5 +1,5 @@
-#ifndef LIST_ELEMENT_HPP_INCLUDED
-#define LIST_ELEMENT_HPP_INCLUDED
+#pragma once
+
 
 #include <string>
 
@@ -16,4 +16,4 @@ struct ListElement
   std::string topic;
 };
 
-#endif /* LIST_ELEMENT_HPP_INCLUDED */
+