#26 keep-together and spacing-after don't work together

[habi]

When I apply 'keep-together' and 'spacing-after'
attributes on a paragraph, the spacing-after settings
has no influence.

Example XML:

<?xml version="1.0" encoding="UTF-8"?>
<document size="A4">
<paragraph keep-together="true" spacing-after="20">
Lorem ipsum
</paragraph>
<paragraph spacing-after="20">
Lorem ipsum
</paragraph>
<paragraph>
Lorem ipsum
</paragraph>
</document>