Consistent behavior in stripping unnecessary empty lines/spaces between Wiki and WYSIWYG editors

Take this example:

    1.1 Section a

some     text    


1.1 Section b


some other text

There are some unnecessary empty lines and space in that text. The correct rendering is equivalent to:

1.1 Section a

some     text    

1.1 Section b

some other text

Right now the editors behave like this:

• Wiki editeur does not change doc content but renders without unnecessary blank lines/spaces
• WYSIWYG editor changes the doc content by removing the unnecessary blank lines/spaces

We should have the same behavior for both, so:

• either the Wiki editor should strip unnecessary lines/spaces
• either the WYSIWYG editor shouldn't modify the content and keep the unnecessary blank lines/spaces