Escape & in URLs.

CMakeLists.txt

@@ -1,6 +1,6 @@
 cmake_minimum_required (VERSION 3.2)
 project(gitea2rss
-  VERSION 0.4.3
+  VERSION 0.4.4
   LANGUAGES CXX
 )
 

gitea2rss.1.adoc

@@ -51,7 +51,7 @@ this in it:
       href="https://rss.example.com/?repo={{.Repository.Owner.Name}}/{{.Repository.Name}}"/>
 <link rel="alternate" type="application/rss+xml"
       title="Tags of {{.Repository.Name}}"
-      href="https://rss.example.com/?repo={{.Repository.Owner.Name}}/{{.Repository.Name}}&type=tags"/>
+      href="https://rss.example.com/?repo={{.Repository.Owner.Name}}/{{.Repository.Name}}&amp;type=tags"/>
 {{end}}
 ----
 

src/write.cpp

@@ -15,6 +15,7 @@
  */
 
 #include <iostream>
+#include <regex>
 #include <cstdlib>
 #include "version.hpp"
 #include "gitea2rss.hpp"
@@ -58,6 +59,7 @@ void write_preamble(const string &url, const string &type)
             selfurl = "http://";
         }
         selfurl += string(server_name) + request_uri;
+        selfurl = std::regex_replace(selfurl, std::regex("&"), "&amp;");
     }
 
     cout << "<rss version=\"2.0\" xmlns:atom=\"http://www.w3.org/2005/Atom\">\n"