• OverfullWarning . . . . 1 match
       \setlength\overfullrule{5pt}
• PlainTeX/diffLaTeX . . . . 2 matches
        1. LaTeX‘s \overfullrule is 0in. The \hfuzz is still a small dimension, but the black overfull boxes are invisible. If you want to see the overfull box, you can use the draft option in the \documentclass or change the \overfullrule.
• PrimitiveControlSequences . . . . 1 match
        *[[\overfullrule]]

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