Invalid padding of list item in certain situations.

[ignasi35]

As mentioned in https://github.com/lagom/lagom/pull/516/files#r102375824 there's certain situations in which list items will use the wrong padding.

I tried to nail down the issue but the rules to generate the HTML seem a bit more complex than I anticipated. I used the markdown:

After working through "Getting started with Lagom", follow the path that make the most sense to you:

* single item list (uses smaller font, padding underneath comes from ul-tag):

A separator paragraph, lorem ipsum. Lorem ipsum dolor sit amet, consectetur adipiscing elit.

* single item list with nested list (uses smaller font and no padding:
    * asdf
    * asdf
    * asdf

A separator paragraph, lorem ipsum. Lorem ipsum dolor sit amet, consectetur adipiscing elit. 

* first item of a list with nested list (uses bigger font and padding, ¿both from p-tag?):
    * [[Import an existing Maven project into Eclipse|EclipseMavenInt]]
    * [[Create a new Eclipse project using the Lagom Maven archetype|EclipseMavenNew]]
    * [[Import an existing sbt build into Eclipse|EclipseSbt]]

* second item of a list with nested list (uses bigger font and padding, ¿both from p-tag?):
    * [[Import an existing Maven project into Intellij|intellijMaven]]
    * [[Import an existing sbt build into Intellij|IntellijSbtJava]]

* last item of a list (uses bigger font, why?)

Which creates the page:

[ignasi35]

See also https://github.com/lagom/lagom.github.io/pull/44/files#r104664780

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