◊(Local Yarn Code "Diff")

The @code{fndef} for a given id may be placed anywhere in the source document, even before it is
referenced. If you create a @code{fn} reference without a corresponding @code{fndef},
a @code{"Missing footnote definition!"} message will be substituted for the footnote text.
Conversely, creating a @code{fndef} that is never referenced will produce no output, warning or
error.

@deftogether[(@defproc[(dialogue [elements xexpr?] ...) txexpr?]
              @defproc[(say [interlocutor string?] [elements xexpr?] ...) txexpr?]
              @defproc[(saylines [interlocutor string?] [elements xexpr?] ...) txexpr?])]

Use these tags together for transcripts of dialogue, chats, screenplays, interviews and so
forth. The @racket[saylines] tag is the same as @racket[say] except that within @racket[saylines],
linebreaks within paragraphs are preserved.

Example usage:

@codeblock|{
  #lang pollen

  ◊dialogue{

              @defproc[(b      [element xexpr?] ...) txexpr?]
              @defproc[(strong [element xexpr?] ...) txexpr?]
              @defproc[(strike [element xexpr?] ...) txexpr?]
              @defproc[(ol     [element xexpr?] ...) txexpr?]
              @defproc[(ul     [element xexpr?] ...) txexpr?]
              @defproc[(item   [element xexpr?] ...) txexpr?]
              @defproc[(sup    [element xexpr?] ...) txexpr?]
              @defproc[(caps   [element xexpr?] ...) txexpr?]
              @defproc[(code   [element xexpr?] ...) txexpr?])]
Work pretty much how you’d expect.

@section{Convenience macros}

@defform[(for/s thing-id listofthings result-exprs ...)
         #:contracts ([listofthings (listof any/c)])]