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5.12.4 ‘@|’: Literal vertical bar, or optional line break

In the TeX (documentation) part of a section, ‘@|’ inserts a vertical bar. Here's a LaTeX example:

     \begin{verbatim}
       The constructions @|x@| and |x| are very different.
     \end{verbatim}

You might wish to try this out to see what Fweave produces.

In a code part, ‘@|’ inserts an optional line break in an expression.