Pretty sure I explained this upthread, but anyway, it's not the forum software - it's fundamental to the way HTML presentation works. White space is white space. You can experiment with this by writing a very simple HTML file with a few sentences. Try putting 1 space; try putting 100. It will look the same.
Oops - meant to further explain - you don't need a web server for this. You can just "File-> Open file" and navigate to the foo.html file you created.