Update Xcode template material

tools/xcode/templates/SFML/SFML App.xctemplate/main.cpp

@@ -10,14 +10,14 @@
 // computer.
 //
 // Your resource files (images, sounds, fonts, ...) are also copied to your
-// application bundle. To get the path to these resource, use the helper
-// method resourcePath() from ResourcePath.hpp
+// application bundle. To get the path to these resources, use the helper
+// function `resourcePath()` from ResourcePath.hpp
 //
 
 #include <SFML/Audio.hpp>
 #include <SFML/Graphics.hpp>
 
-// Here is a small helper for you ! Have a look.
+// Here is a small helper for you! Have a look.
 #include "ResourcePath.hpp"
 
 int main(int, char const**)