left out the right )
this is basically grep()
a final attack at http://stackoverflow.com/q/12448507/559676
paste highlight into one string
fixes 487: should not set out.width='.6\\linewidth' for Rhtml and Rmd; only applies to Rnw
implement this feature request: http://yihui.name/knitr/demo/graphics/#comment-807840855
bump version