formline PICTURE,LIST
            This is an internal function used by "format"s, though you may
            call it, too. It formats (see perlform) a list of values
            according to the contents of PICTURE, placing the output into
            the format output accumulator, $^A (or $ACCUMULATOR in English).
            Eventually, when a "write" is done, the contents of $^A are
            written to some filehandle. You could also read $^A and then set
            $^A back to "". Note that a format typically does one "formline"
            per line of form, but the "formline" function itself doesn't
            care how many newlines are embedded in the PICTURE. This means
            that the "~" and "~~" tokens treat the entire PICTURE as a
            single line. You may therefore need to use multiple formlines to
            implement a single record format, just like the "format"
            compiler.

            Be careful if you put double quotes around the picture, because
            an "@" character may be taken to mean the beginning of an array
            name. "formline" always returns true. See perlform for other
            examples.

            If you are trying to use this instead of "write" to capture the
            output, you may find it easier to open a filehandle to a scalar
            ("open $fh, ">", \$output") and write to that instead.