Helper functions for write2.
verbatim(...)
code.chunk(..., chunk.opts = "r")The "verbatim" class is to tell write2 to print the object inside
a section surrounded by three back ticks. The results will look like it would in the terminal (monospaced).
code.chunk() is to write explicit code chunks in the .Rmd file; it captures the call and writes it to the
file, to execute upon knitting.