Markdown reader: fix interaction of --strip-comments and list

parsing.  Use of `--strip-comments` was causing tight lists
to be rendered as loose (as if the comment were a blank line).
Closes #7521.

1 files changed, 11 insertions, 0 deletions

diff --git a/test/command/7521.md b/test/command/7521.md
new file mode 100644
index 000000000..38bc40482
--- /dev/null
+++ b/test/command/7521.md
@@ -0,0 +1,11 @@
+```
+% pandoc  -- --strip-comments
+- one
+  <!-- with comm -->
+- two
+- ^D
+<ul>
+<li>one </li>
+<li>two</li>
+</ul>
+```