句点切
script.jsscrapbox.PopupMenu.addButton({
title: text => text.match(/[。.]/) ? '句点切り' : null,
onClick: text => text.replace(/[。.]/g, '\n'),
})句点残す
text => text.replace(/[。.]/g, '$&\n') 
script.jsscrapbox.PopupMenu.addButton({
title: text => text.match(/[。.]/) ? '句点切り' : null,
onClick: text => text.replace(/[。.]/g, '\n'),
}) text => text.replace(/[。.]/g, '$&\n')