Tables with column ending with HTML tag aren't rendered right

[syvb]

Enable mdbook-toc in the book.toml, then put this into a page:

a | b
--|--
<span>a</span> | b

produces

The table should be one row, not two rows with one column per row. This only happens when this extension is used, which is odd because this doesn't use any of the extension's features.

[badboy]

I think this might be yet another instance of a roundtripping bug in pulldown-cmark-to-cmark really.
Here's a test case for mdbook-toc we can add when we get that fixed:

diff --git tests/it.rs tests/it.rs
index 6f257e4..4c6b350 100644
--- tests/it.rs
+++ tests/it.rs
@@ -145,3 +145,8 @@ fn similar_heading_different_casing() {
 
     assert_toc!("similar_heading_different_casing");
 }
+
+#[test]
+fn tables_with_html() {
+    assert_toc!("tables_with_html");
+}
diff --git tests/tables_with_html.in.md tests/tables_with_html.in.md
new file mode 100644
index 0000000..9f13052
--- /dev/null
+++ tests/tables_with_html.in.md
@@ -0,0 +1,5 @@
+# Heading
+
+| Head 1 | Head 2 |
+|--------|--------|
+| <span>Row 1</span> | Row 2  |
diff --git tests/tables_with_html.out.md tests/tables_with_html.out.md
new file mode 100644
index 0000000..97e5b03
--- /dev/null
+++ tests/tables_with_html.out.md
@@ -0,0 +1,5 @@
+# Heading
+
+|Head 1|Head 2|
+|------|------|
+|<span>Row 1</span>|Row 2|

It currently faills because an extra newline is added:

---- tables_with_html stdout ----
thread 'tables_with_html' panicked at 'assertion failed: `(left == right)`

Diff < left / right > :
<"# Heading\n\n|Head 1|Head 2|\n|------|------|\n|<span>Row 1</span>|Row 2|"
>"# Heading\n\n|Head 1|Head 2|\n|------|------|\n|<span>Row 1</span>\n|Row 2|"