Add md-footnote

crates/lib/md-footnote/tests/fixtures/0.md

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+Basic test
+
+......
+
+[^a]
+[^a]
+
+[^a]: Multi
+line
+
+    Multi-paragraph
+
+[^a]: duplicate
+
+normal paragraph
+
+......
+
+<p data-sourcepos="1:1-2:4"><sup data-sourcepos="1:1-1:4" class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup>
+<sup data-sourcepos="2:1-2:4" class="footnote-ref"><a href="#fn1" id="fnref2">[1]</a></sup></p>
+<p data-sourcepos="11:1-11:16">normal paragraph</p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li data-sourcepos="4:1-8:0" id="fn1" class="footnote-item">
+<p data-sourcepos="4:7-5:4">Multi
+line</p>
+<p data-sourcepos="7:5-7:19">Multi-paragraph <a href="#fnref1" class="footnote-backref">↩︎</a> <a href="#fnref2" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>

crates/lib/md-footnote/tests/fixtures/1.md

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+Pandoc example
+
+......
+
+Here is a footnote reference,[^1] and another.[^longnote]
+
+[^1]: Here is the footnote.
+
+[^longnote]: Here's one with multiple blocks.
+
+    Subsequent paragraphs are indented to show that they
+belong to the previous footnote.
+
+        { some.code }
+
+    The whole paragraph can be indented, or just the first
+    line.  In this way, multi-paragraph footnotes work like
+    multi-paragraph list items.
+
+This paragraph won't be part of the note, because it
+isn't indented.
+
+......
+
+<p data-sourcepos="1:1-1:57">Here is a footnote reference,<sup data-sourcepos="1:30-1:33" class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup> and another.<sup data-sourcepos="1:47-1:57" class="footnote-ref"><a href="#fn2" id="fnref2">[2]</a></sup></p>
+<p data-sourcepos="16:1-17:15">This paragraph won't be part of the note, because it
+isn't indented.</p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li data-sourcepos="3:1-4:0" id="fn1" class="footnote-item">
+<p data-sourcepos="3:7-3:27">Here is the footnote. <a href="#fnref1" class="footnote-backref">↩︎</a></p>
+</li>
+<li data-sourcepos="5:1-15:0" id="fn2" class="footnote-item">
+<p data-sourcepos="5:14-5:45">Here's one with multiple blocks.</p>
+<p data-sourcepos="7:5-8:32">Subsequent paragraphs are indented to show that they
+belong to the previous footnote.</p>
+<pre><code data-sourcepos="10:9-10:21">{ some.code }
+</code></pre>
+<p data-sourcepos="12:5-14:31">The whole paragraph can be indented, or just the first
+line.  In this way, multi-paragraph footnotes work like
+multi-paragraph list items. <a href="#fnref2" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>

crates/lib/md-footnote/tests/fixtures/10.md

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+Newline after footnote identifier
+
+......
+
+[^a]
+
+[^a]:
+b
+
+......
+
+<p data-sourcepos="1:1-1:4"><sup data-sourcepos="1:1-1:4" class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup></p>
+<p data-sourcepos="4:1-4:1">b</p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li data-sourcepos="3:1-3:5" id="fn1" class="footnote-item"> <a href="#fnref1" class="footnote-backref">↩︎</a></li>
+</ol>
+</section>

crates/lib/md-footnote/tests/fixtures/2.md

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+They could terminate each other
+
+......
+
+[^1][^2][^3]
+
+[^1]: foo
+[^2]: bar
+[^3]: baz
+
+......
+
+<p data-sourcepos="1:1-1:12"><sup data-sourcepos="1:1-1:4" class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup><sup data-sourcepos="1:5-1:8" class="footnote-ref"><a href="#fn2" id="fnref2">[2]</a></sup><sup data-sourcepos="1:9-1:12" class="footnote-ref"><a href="#fn3" id="fnref3">[3]</a></sup></p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li data-sourcepos="3:1-3:9" id="fn1" class="footnote-item">
+<p data-sourcepos="3:7-3:9">foo <a href="#fnref1" class="footnote-backref">↩︎</a></p>
+</li>
+<li data-sourcepos="4:1-4:9" id="fn2" class="footnote-item">
+<p data-sourcepos="4:7-4:9">bar <a href="#fnref2" class="footnote-backref">↩︎</a></p>
+</li>
+<li data-sourcepos="5:1-5:9" id="fn3" class="footnote-item">
+<p data-sourcepos="5:7-5:9">baz <a href="#fnref3" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>

crates/lib/md-footnote/tests/fixtures/3.md

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+They could be inside blockquotes, and are lazy
+
+......
+
+[^foo]
+
+> [^foo]: bar
+baz
+
+......
+
+<p data-sourcepos="1:1-1:6"><sup data-sourcepos="1:1-1:6" class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup></p>
+<blockquote data-sourcepos="3:1-4:3">
+</blockquote>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li data-sourcepos="3:3-4:3" id="fn1" class="footnote-item">
+<p data-sourcepos="3:11-4:3">bar
+baz <a href="#fnref1" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>

crates/lib/md-footnote/tests/fixtures/4.md

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+Their labels could not contain spaces or newlines
+
+......
+
+[^ foo]: bar baz
+
+[^foo
+]: bar baz
+
+......
+
+<p data-sourcepos="1:1-1:16">[^ foo]: bar baz</p>
+<p data-sourcepos="3:1-4:10">[^foo
+]: bar baz</p>

crates/lib/md-footnote/tests/fixtures/5.md

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+Duplicate footnotes:
+
+......
+
+[^xxxxx] [^xxxxx]
+
+[^xxxxx]: foo
+
+......
+
+<p data-sourcepos="1:1-1:17"><sup data-sourcepos="1:1-1:8" class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup> <sup data-sourcepos="1:10-1:17" class="footnote-ref"><a href="#fn1" id="fnref2">[1]</a></sup></p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li data-sourcepos="3:1-3:13" id="fn1" class="footnote-item">
+<p data-sourcepos="3:11-3:13">foo <a href="#fnref1" class="footnote-backref">↩︎</a> <a href="#fnref2" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>

crates/lib/md-footnote/tests/fixtures/6.md

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+Indents
+
+
+......
+
+[^xxxxx] [^yyyyy]
+
+[^xxxxx]: foo
+    ---
+
+[^yyyyy]: foo
+   ---
+
+......
+
+<p data-sourcepos="1:1-1:17"><sup data-sourcepos="1:1-1:8" class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup> <sup data-sourcepos="1:10-1:17" class="footnote-ref"><a href="#fn2" id="fnref2">[2]</a></sup></p>
+<hr data-sourcepos="7:4-7:6">
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li data-sourcepos="3:1-5:0" id="fn1" class="footnote-item">
+<h2 data-sourcepos="3:11-4:7">foo</h2>
+ <a href="#fnref1" class="footnote-backref">↩︎</a></li>
+<li data-sourcepos="6:1-6:13" id="fn2" class="footnote-item">
+<p data-sourcepos="6:11-6:13">foo <a href="#fnref2" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>

crates/lib/md-footnote/tests/fixtures/8.md

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+Indents for the first line (tabs)
+
+......
+
+[^xxxxx]
+
+[^xxxxx]:		foo
+
+......
+
+<p data-sourcepos="1:1-1:8"><sup data-sourcepos="1:1-1:8" class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup></p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li data-sourcepos="3:1-3:14" id="fn1" class="footnote-item">
+<p data-sourcepos="3:12-3:14">foo <a href="#fnref1" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>

crates/lib/md-footnote/tests/fixtures/9.md

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+Nested blocks
+
+......
+
+[^a]
+
+[^a]: abc
+
+    def
+hij
+
+    - list
+
+    > block
+
+terminates here
+
+......
+
+<p data-sourcepos="1:1-1:4"><sup data-sourcepos="1:1-1:4" class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup></p>
+<p data-sourcepos="12:1-12:15">terminates here</p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li data-sourcepos="3:1-11:0" id="fn1" class="footnote-item">
+<p data-sourcepos="3:7-3:9">abc</p>
+<p data-sourcepos="5:5-6:3">def
+hij</p>
+<ul data-sourcepos="8:5-9:0">
+<li data-sourcepos="8:5-9:0">list</li>
+</ul>
+<blockquote data-sourcepos="10:5-10:11">
+<p data-sourcepos="10:7-10:11">block</p>
+</blockquote>
+ <a href="#fnref1" class="footnote-backref">↩︎</a></li>
+</ol>
+</section>

crates/lib/md-footnote/tests/fixtures/_7.md

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+Indents for the first line
+.............
+
+[^xxxxx] [^yyyyy]
+
+[^xxxxx]:       foo
+
+[^yyyyy]:        foo
+
+.............
+
+<p><sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup> <sup class="footnote-ref"><a href="#fn2" id="fnref2">[2]</a></sup></p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li id="fn1" class="footnote-item">
+<p>foo <a href="#fnref1" class="footnote-backref">↩︎</a></p>
+</li>
+<li id="fn2" class="footnote-item">
+<pre><code>foo
+</code></pre>
+ <a href="#fnref2" class="footnote-backref">↩︎</a></li>
+</ol>
+</section>

crates/lib/md-footnote/tests/fixtures/inline-1.md

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+We support inline notes too (pandoc example)
+
+......
+
+Here is an inline note.^[Inlines notes are easier to write, since
+you don't have to pick an identifier and move down to type the
+note.]
+
+......
+
+<p data-sourcepos="1:1-3:6">Here is an inline note.<sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup></p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li id="fn1" class="footnote-item">
+<p>Inlines notes are easier to write, since
+you don't have to pick an identifier and move down to type the
+note. <a href="#fnref1" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>

crates/lib/md-footnote/tests/fixtures/inline-2.md

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+Inline footnotes can have arbitrary markup
+
+......
+
+foo^[ *bar* ]
+
+......
+
+<p data-sourcepos="1:1-1:13">foo<sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup></p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li id="fn1" class="footnote-item">
+<p> <em data-sourcepos="1:7-1:11">bar</em>  <a href="#fnref1" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>

crates/lib/md-footnote/tests/fixtures/inline-3.md

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+Should allow links in inline footnotes
+
+......
+
+Example^[this is another example [a]]
+
+[a]: https://github.com
+
+......
+
+<p data-sourcepos="1:1-1:37">Example<sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup></p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li id="fn1" class="footnote-item">
+<p>this is another example <a data-sourcepos="1:34-1:36" href="https://github.com">a</a> <a href="#fnref1" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>

crates/lib/md-footnote/tests/fixtures/inline-4.md

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+nested inline footnotes
+
+......
+
+[Example^[this is another example [a]]][a]
+
+[a]: https://github.com
+
+......
+
+<p data-sourcepos="1:1-1:42"><a data-sourcepos="1:1-1:42" href="https://github.com">Example<sup class="footnote-ref"><a href="#fn1" id="fnref1">[1]</a></sup></a></p>
+<hr class="footnotes-sep">
+<section class="footnotes">
+<ol class="footnotes-list">
+<li id="fn1" class="footnote-item">
+<p>this is another example <a data-sourcepos="1:35-1:37" href="https://github.com">a</a> <a href="#fnref1" class="footnote-backref">↩︎</a></p>
+</li>
+</ol>
+</section>