XML lib: documented Element To String and Log Element, fixed typoes
XML lib: documented Element To String and Log Element, fixed typoes

waldenner/robotframework,fiuba08/robotframework,ldtri0209/robotframework,ldtri0209/robotframework,fiuba08/robotframework,waldenner/robotframework,fiuba08/robotframework,fiuba08/robotframework,waldenner/robotframework,ldtri0209/robotframework,waldenner/robotframework,ldtri0209/robotframework,ldtri0209/robotframework,fiuba08/robotframework,waldenner/robotframework