Hi I changed both files and it looks good see below but I have no clue if something else will not work.
Cheers
Morgan
As previously stated, all that the change does is tell the user's browser (chrome/firefox/ie/safari..etc) how to read the page. It doesnt change any data/posts on your server at all.
Anything that your DB or PHP settings are displaying, is purely server-side. The instructions above are about how you want your pages to be displayed on the user-side.