Originally Posted by JSWolf
There's no reason one cannot use a text editor and do text markup to denote various formatting that needs to be applied. Then all that needs to be used is a good text editor such as Notepad++. It's very easy to search/replace to put in all the <p></p> around every paragraph. Then load that into Sigil and go from there.
Sound a bit like using markdown or textile, which both calibre and pandoc can convert to epub for further processing in Sigil. Or even left as-is.