[csswg-drafts] Pull Request: [css-fonts-3] Consistent article "an" for `@font-face`

tomayac has just submitted a new pull request for https://github.com/w3c/csswg-drafts:

== [css-fonts-3] Consistent article "an" for `@font-face` ==
I was arguing with our tech writer whether it should be "a @​font-face" (silent '@') or "a**n** @​font-face" (pronounced '@'). The spec was inconsistent, but generally favored "a**n** @​font-face". I have changed the remaining occurrences to "an".

See https://github.com/w3c/csswg-drafts/pull/5397


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