LON-CAPA User Help: How do I get rid of unmatched tag warnings?

<a href="">LON-CAPA User Help</a> : <a href="">Authoring</a> :
How do I get rid of unmatched tag warnings?
    Make sure all your tags have a closing tag or have a slash at the end 
    (<br ></br > can be denoted <br />). Problems should have no warnings! 
    Plain HTML pages _may_ be able to handles some of the warnings, but problems 
    should be warning free.
    
    An example:
    
    <p > Paragraph text </p >
    <hr > replaced with <hr />
    <i ><b > text </b ></i > is correct (<i ><b > text </i ></b > is wrong)


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