if you write extra_css = 'h2{font-family :Arial,Helvetica,sans-serif; font-size:x-small}' in you code, then the <h2> tag in the article will get these attributes.
if you want to edit an other tag, add in like i wrote above.
what i am trying to say is, what is the specific recipe you are working on and what exactly do you want done there? is it to change the font of some tag? the width of a table?
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