Hello Sinom Bre,
Welcome to Mobile Read! This is a slightly old thread - almost 4 years old.
When you speak of blank lines between paragraphs in code view, do you mean an actual paragraph with an empty line, or just empty space?
If it is empty space, then there is nothing you need to do. That space is there just to make it easy for the formatter (you) to differentiate the paragraphs. Blank space is not recognized by the renderer and condensed down to a single space within tags, and completely ignored outside of tags.
If it is an actual paragraph tag with empty space in there, eg. <p> </p> (or something) then you can just use a search and replace to delete them.
search: <p> </p>
replace: "" (without the quotes)
One bit of warning... sometimes those empty paragraphs are intentionally left in there to signify scene breaks...an extra space between one time/place and the next. So I would check to make sure they are not intended before deleting them.
Cheers,
edit: If you absolutely HAVE to get rid of the space between paragraphs then you can use a search/replace.
eg:
search: </p>\s*<p> (or something)
replace: </p>\n<p>
Just remember to disable the prettify code otherwise it will put spaces back in there.