Earlier today I discovered an an app called Get Plain Text that automatically strips out formatting when text is copied from a PDF or webpage etc before pasting to another location, such as a web page where it might mess with your results. https://itunes.apple.com/gb/app/get-plain-text/id508368068?mt=12
You just install it and set your preferences, then forget it. This is free but there is an option to make a donation if you wish and I think this could potentially be a huge time saver. Copy pasting from word docs for example is notorious for causing problems with web pages. I often run text through text wrangler first, before pasting to a Blocs project but this should eliminate the need for that.