do not modify PATH under Mac; use kpsewhich() to find kpsewhich
markdown is imported now, so yes, just use it
play hide and seek on some internal functions from tools because R-devel will NOTE them
so that R CMD check won't see tcltk again
bump version
move \ensuremath from format_sci to the latex inline hook, so that format_sci() can be generally useful
of course I should have credited Romain for highlight
this example function is not used anywhere, so remove it
news about #587
bump version