Add gotcha about nested comprehensions not being supported
Add gotcha about nested comprehensions not being supported

kovidgoyal/rapydscript-ng,kovidgoyal/RapydScript,kovidgoyal/RapydScript,kovidgoyal/RapydScript,kovidgoyal/rapydscript-ng,kovidgoyal/rapydscript-ng,kovidgoyal/rapydscript-ng