Add some examples for generating xml files

[pktiuk]

I think it would be good to also provide some examples showing in docs how to create XML files, not only how to read these files.
I think examples similar to these from this tutorial would be good.

[ajtruckle]

That nice article doesn't mention about setting the declaration at the top which you normally need.

From: Paweł Kotiuk [email protected] Sent: 09 February 2021 13:07 To: leethomason/tinyxml2 [email protected] Cc: Subscribed [email protected] Subject: [leethomason/tinyxml2] Add some examples for generating xml files (#848)

I think it would be good to also provide some examples showing how to create XML files, not only how to read. I think examples similar to these from this tutorialhttps://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fshilohjames.wordpress.com%2F2014%2F04%2F27%2Ftinyxml2-tutorial%2F&data=04%7C01%7C%7Ce20082ebe232495e79b508d8ccfba09a%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637484728381770588%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=M9ZeB0NFIGrbVA%2F%2BDK7qFamHffwBfFSkYMQAGwG9n9Y%3D&reserved=0 would be good.

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