Markdown writer: preserve figure attributes

0d2114e introduced a bug where Markdown writer would ignore attributes
on the figure if it has class or key-value attributes set.

This commit fixes that and adds a regression test.

Closes #10867

1 files changed, 26 insertions, 0 deletions

diff --git a/test/command/10867.md b/test/command/10867.md
new file mode 100644
index 000000000..8852e1131
--- /dev/null
+++ b/test/command/10867.md
@@ -0,0 +1,26 @@
+```
+% pandoc -f native -t markdown-raw_html
+[ Figure
+    ( "fig:foo" , [] , [ ( "label" , "1.1" ) ] )
+    (Caption
+       Nothing
+       [ Plain
+           [ Str "Figure" , Space , Str "1.1:" , Space , Str "Figure" ]
+       ])
+    [ Plain
+        [ Image
+            ( "" , [] , [] )
+            [ Str "Figure" , Space , Str "1.1:" , Space , Str "Figure" ]
+            ( "./image.png" , "" )
+        ]
+    ]
+]
+^D
+:::: {#fig:foo .figure label="1.1"}
+![Figure 1.1: Figure](./image.png)
+
+::: caption
+Figure 1.1: Figure
+:::
+::::
+```