update to modern gdc compatibility

init/init.d

@@ -2,10 +2,10 @@
 import std.stdio;
 
 int magicNumber = 42;
-char[] password = "sesame";
+string password = "sesame";
 
 void main()
 {
-    writefln("Magic number: ", magicNumber);
-    writefln("Password: ", password);
+    writefln("Magic number: %s", magicNumber);
+    writefln("Password: %s", password);
 }