these functions build the header function and the footer function
used by the html renderer
Usage
header_html(document, stylesheet)
footer_html(document)
Arguments
document
logical. If TRUE the built header and footer
functions will return the beginning and end
of a full html document. If FALSE, the built functions will
only return the opening and closing tags.
stylesheet
stylesheet to use. See getStyleFile for details
on where the stylesheet can be located.
Value
header and footer functions.
See Also
renderer_html uses these functions to create a renderer
suitable for the renderer argument of highlight