A character vector which if written to a file, one element per line,
would duplicate the text elements of the original Sweave input file.
Details
This function blanks out all Noweb markup and code chunks from an
Sweave input file, leaving behind the LaTeX source, so that a
LaTeX-aware spelling checker can check it and report errors in their
original locations.
See Also
aspell, for which this is used with filter = "Sweave".