Incorrect line spacing after deleting everything in document in Firefox

[Martin Kou]

Reproduction procedure:

1. Go to sample01.html.
2. Press Ctrl-A to select all.
3. Press Del to delete everything.
4. Type "First line", press Enter.
5. Type "Second line", press Enter.
6. Type "Third line", press Enter.
7. Notice the line spacing between "First line" and "Second line" is much larger than expected.

This bug does not occur in 2.4.3.

[Martin Kou]

I've traced the error to @308. Before @308 (say, @307), the error does not occur.

[308] is quite a large change however. So I'll need some time to investigate what went wrong with it.

[Frederico Caldeira Knabben]

Actually it is not really space there. We have two "bogus BR" inside the first paragraph:

<p>
    First line<br _moz_dirty=""/><br type="_moz"/>
</p>

Probably Firefox added the first <br> when deleting, and we are adding the second one when hitting enter. Maybe something need to be changed at FCKTools.AppendBogusBr.

[Martin Kou]

Fixed with [650].

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