HTML writer: make line breaks more consistent.

- With `--wrap=none`, we now output line breaks between
  block-level elements. Previously they were omitted
  entirely, so the whole document was on one line, unless
  there were literal line breaks in pre sections.  This makes
  the HTML writer's behavior more consistent with that of
  other writers.

- Put newline after `<dd>`.

- Put newlines after block-level elements in footnote section.

1 files changed, 44 insertions, 22 deletions

diff --git a/test/writer.html5 b/test/writer.html5
index cdfcf042f..d8e89b3e2 100644
--- a/test/writer.html5
+++ b/test/writer.html5
@@ -379,47 +379,58 @@ back.</p></li>
 <p>Tight using spaces:</p>
 <dl>
 <dt>apple</dt>
-<dd>red fruit
+<dd>
+red fruit
 </dd>
 <dt>orange</dt>
-<dd>orange fruit
+<dd>
+orange fruit
 </dd>
 <dt>banana</dt>
-<dd>yellow fruit
+<dd>
+yellow fruit
 </dd>
 </dl>
 <p>Tight using tabs:</p>
 <dl>
 <dt>apple</dt>
-<dd>red fruit
+<dd>
+red fruit
 </dd>
 <dt>orange</dt>
-<dd>orange fruit
+<dd>
+orange fruit
 </dd>
 <dt>banana</dt>
-<dd>yellow fruit
+<dd>
+yellow fruit
 </dd>
 </dl>
 <p>Loose:</p>
 <dl>
 <dt>apple</dt>
-<dd><p>red fruit</p>
+<dd>
+<p>red fruit</p>
 </dd>
 <dt>orange</dt>
-<dd><p>orange fruit</p>
+<dd>
+<p>orange fruit</p>
 </dd>
 <dt>banana</dt>
-<dd><p>yellow fruit</p>
+<dd>
+<p>yellow fruit</p>
 </dd>
 </dl>
 <p>Multiple blocks with italics:</p>
 <dl>
 <dt><em>apple</em></dt>
-<dd><p>red fruit</p>
+<dd>
+<p>red fruit</p>
 <p>contains seeds, crisp, pleasant to taste</p>
 </dd>
 <dt><em>orange</em></dt>
-<dd><p>orange fruit</p>
+<dd>
+<p>orange fruit</p>
 <pre><code>{ orange code block }</code></pre>
 <blockquote>
 <p>orange block quote</p>
@@ -429,38 +440,49 @@ back.</p></li>
 <p>Multiple definitions, tight:</p>
 <dl>
 <dt>apple</dt>
-<dd>red fruit
+<dd>
+red fruit
 </dd>
-<dd>computer
+<dd>
+computer
 </dd>
 <dt>orange</dt>
-<dd>orange fruit
+<dd>
+orange fruit
 </dd>
-<dd>bank
+<dd>
+bank
 </dd>
 </dl>
 <p>Multiple definitions, loose:</p>
 <dl>
 <dt>apple</dt>
-<dd><p>red fruit</p>
+<dd>
+<p>red fruit</p>
 </dd>
-<dd><p>computer</p>
+<dd>
+<p>computer</p>
 </dd>
 <dt>orange</dt>
-<dd><p>orange fruit</p>
+<dd>
+<p>orange fruit</p>
 </dd>
-<dd><p>bank</p>
+<dd>
+<p>bank</p>
 </dd>
 </dl>
 <p>Blank line after term, indented marker, alternate markers:</p>
 <dl>
 <dt>apple</dt>
-<dd><p>red fruit</p>
+<dd>
+<p>red fruit</p>
 </dd>
-<dd><p>computer</p>
+<dd>
+<p>computer</p>
 </dd>
 <dt>orange</dt>
-<dd><p>orange fruit</p>
+<dd>
+<p>orange fruit</p>
 <ol type="1">
 <li>sublist</li>
 <li>sublist</li>