[tex-eplain] optional arguments

[Adam Fenn]

How can I modify this example from the eplain manual so that the optional argument
follows the first argument i.e \cmd{One}[Two] rather than \cmd[Two]{One}?

\makeatletter
\def\cmd{\@getoptionalarg\finishcmd} 
\def\finishcmd#1{% 
\ifx\@optionalarg\empty 
% No optional argument present.
#1
 \else 
 % One was present. 
{\@optionalarg} {\it#1}
 \fi} 
 \resetatcatcode 

Thanks in advance,
Adam Fenn.

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