[texhax] Why are there two definitions of \loop \repeat in latex.ltx?

[Vafa Khalighi]

Hi

In lines 101-104 of latex.ltx:

\def\loop#1\repeat{\def\iterate{#1\relax\expandafter\iterate\fi}%
  \iterate \let\iterate\relax}
\let\repeat\fi

In lines 450-457 of latex.ltx, you have (essentially the same definition
but with \long):

\long\def \loop #1\repeat{%
  \def\iterate{#1\relax  % Extra \relax
               \expandafter\iterate\fi
               }%
  \iterate
  \let\iterate\relax
}
\let\repeat=\fi

Do you know why there are two definitions instead one? I guess you would
only need second definition.

Thanks
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