Nested lists render inconsistently

[GuySartorelli]

Add the following to the kitchen link.

- This is a list with a nested list with a nested list
    1. This is the nested list. It's ordered.
        1) This is the nested-nested list. Wild.
    1. Back to the first list.
        * We can nest them like this too.
- cool, huh?

Even when you adjust the kitchen-sink-expected to just be whatever the output from the renderer is, it'll fail the test_it_parses_kitchen_sink_and_parsing_the_result_again_returns_the_same_result test.

The rendered result has additional line breaks that aren't in the original, and less padding than exists in the original.

[GuySartorelli]

I'm not sure what's adding the extra line breaks, but I suspect the incorrect padding (it's always less padding in the rendered result than the original) is a result of ignoring markerOffset (we can see in ListItemParser and in ListBlockStartParser that markerOffset should be added to the padding).