Replace Element and makeHierarchical with makeSections.

Text.Pandoc.Shared:

+ Remove `Element` type [API change]
+ Remove `makeHierarchicalize` [API change]
+ Add `makeSections` [API change]
+ Export `deLink` [API change]

Now that we have Divs, we can use them to represent the structure
of sections, and we don't need a special Element type.
`makeSections` reorganizes a block list, adding Divs with
class `section` around sections, and adding numbering
if needed.

This change also fixes some longstanding issues recognizing
section structure when the document contains Divs.
Closes #3057, see also #997.

All writers have been changed to use `makeSections`.
Note that in the process we have reverted the change
c1d058aeb1c6a331a2cc22786ffaab17f7118ccd
made in response to #5168, which I'm not completely
sure was a good idea.

Lua modules have also been adjusted accordingly.
Existing lua filters that use `hierarchicalize` will
need to be rewritten to use `make_sections`.

1 files changed, 0 insertions, 1 deletions

diff --git a/test/writer.html5 b/test/writer.html5
index 9b0f19b64..35772350c 100644
--- a/test/writer.html5
+++ b/test/writer.html5
@@ -445,7 +445,6 @@ Blah
 <li>Escaped <code>$</code>: $73 <em>this should be emphasized</em> 23$.</li>
 </ul>
 <p>Here’s a LaTeX table:</p>
-
 <hr />
 <h1 id="special-characters">Special Characters</h1>
 <p>Here is some unicode:</p>