[texhax] Knuth's rules for the indefinite article

Plamen Tanovski pgt at arcor.de
Thu Apr 29 19:30:35 CEST 2004


looking in texbook.tex I've noticed that Knuth uses sometimes
nonbreakable space after the indefinite article, e.g. "once in
a~while" or a~|$| or if the next word is the last in a sentence. My
question is: is there any precise description of this rules?

Best regards,

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