\HeaderA{testit}{}{testit}
\begin{Usage}
\begin{verbatim}
\x \y %{}

foo(x, y)
a link
\end{verbatim}
\end{Usage}
\begin{Details}\relax
Escaped backslash \code{\bsl{}x}.
Unescaped backslash \code{\bsl{}y}.

\code{\%\{\}}

var in \var{text}.

\code{foo(\var{x}, \var{y})}.
\begin{alltt}
  Escaped backslash \bsl{}x.
  Unescaped backslash \bsl{}y.

  \%\{\}

  var in \var{text}.
  
  foo(\var{x}, \var{y}).
\end{alltt}
\end{Details}
\begin{Examples}
\begin{ExampleCode}
\x
\y
%{}
a link
foo(x, y)
\end{ExampleCode}
\end{Examples}

