First of all, I'll start by saying that I don't know if everyone alreary knows about this.
So, you know those pastas that have wrong fonts, wrong colors or wrong font sizes? To make it look right, there's no need to go into source mode and remove all the lines of code at the start and end of paragraphs. You can simply go into visual mode, select all the content, cut it, and paste it into source mode. That'll instantly fix the formatting.