Preserve newlines inside HTML code

[josevalim]

This slightly changes the HTML representation of the underlying nodes.

Before, this html:

<code>
pre
post
</code>

Would come out as:

{:code, [], ["pre", "post"]}

And now it comes out as:

{:code, [], ["pre\npost"]}

While both representations are correct, the second representation where all text nodes are collapsed into one is more common:

iex>  Floki.parse_fragment("<code>foo\nbar</code>")
{:ok, [{"code", [], ["foo\nbar"]}]}

[coveralls]

Pull Request Test Coverage Report for Build 1cc3cacc73aefedc161a248265466add5c093a60-PR-97

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 8 of 8 (100.0%) changed or added relevant lines in 2 files are covered.
• 18 unchanged lines in 10 files lost coverage.
• Overall coverage increased (+2.5%) to 96.518%

---

Files with Coverage Reduction	New Missed Lines	%
lib/earmark_parser/ast/emitter.ex	1	83.33%
lib/earmark_parser/ast_renderer.ex	1	96.83%
lib/earmark_parser/ast/renderer/table_renderer.ex	1	92.31%
lib/earmark_parser/helpers/pure_link_helpers.ex	1	95.65%
lib/earmark_parser/helpers/string_helpers.ex	1	75.0%
lib/earmark_parser/helpers.ex	2	88.89%
lib/earmark_parser/helpers/html_parser.ex	2	91.67%
lib/earmark_parser/line_scanner.ex	2	95.41%
lib/earmark_parser/parser/list_parser.ex	2	89.71%
lib/earmark_parser/parser.ex	5	87.72%
<!--	Total:	18		-->

Totals
Change from base Build 199e8dd5d9f9a2fc0415a027ec3d6d8f1aeb7f08:	2.5%
Covered Lines:	887
Relevant Lines:	919

---

💛 - Coveralls

[RobertDober]

Great, thank you José