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  • yes, but why endgraf not par, or more simply,a blank line? (or just remove the \begingroup \endgroup that causes the problem) Commented Oct 8, 2023 at 8:00
  • @DavidCarlisle In my first version \endgraf was in the argument of \textbf, and \par generated errors. Commented Oct 8, 2023 at 8:24