Force line breaks

Hi all,

Is there a markup in reStructuredText, that forces a line break only,
and is not interpreted as a block quote with indentation like line block?

I would like to force line breaks in a numerated list.

#. | First line
   | Second line
   | Third line
#. Item with only one line
#. Another item

Looking at restructuredText examples and the rtd theme, the line block
markup seems to be expected to be rendered with a left margin in html,
while it does not produce a margin with latex.
As a consequence, the first item will be indented by 24px and the one line
Items are not indented.

Is there an alternative markup, or do I have to customise the css?

BR,

Stefan

------------------------------------------------------------------------------