The WYSIWYG Editor removes new lines before and after Wiki Code it does not understand.

For example:

—
test line

{section} {column:width=50%}

test line 2
{column} {column:width=50%}

test line 3
{column}{section}

—

This becomes:

—
test line

{section} {column:width=50%}
test line 2{column} {column:width=50%}
test line 3{column}{section}

—

I have seen even worse cases, where the closing Wiki tags where shown on the same line as the text, eg.:

—
test line

{section}{column:width=50%}
test line 2{column} {column:width=50%}
test line 3{column}{section}

—

I cannot reproduce that. However, I could give you an example that shows the result (I had created the text with the Wiki editor, and another user changed the text with the WYSIWYG editor).

Especially the second case is very annoying as you cannot compare the text versions then easily, as there are too many differences.