Remove starting newline in RawBlock of format markdown.

They add no effect prior to Pandoc 3.6.3 are they were collapse. From Pandoc 3.6.3 they are not anymore

Related Pandoc change: jgm/pandoc@d9281d1 to solve jgm/pandoc#10477

Author: cderv

src/resources/extensions/quarto/docusaurus/docusaurus.lua

@@ -139,7 +139,7 @@ end, function(node)
     start.content:insert(pandoc.RawInline("markdown", "]\n"))
     admonition:insert(start)
   else
-    admonition:insert(pandoc.RawBlock("markdown", "\n:::" .. node.type))
+    admonition:insert(pandoc.RawBlock("markdown", ":::" .. node.type))
   end
   local content = node.content
   if type(content) == "table" then

src/resources/filters/customnodes/floatreftarget.lua

@@ -1051,7 +1051,7 @@ end, function(float)
   local caption_location = cap_location(float)
 
   local open_block = pandoc.RawBlock("markdown", "<div id=\"" .. float.identifier .. "\">\n")
-  local close_block = pandoc.RawBlock("markdown", "\n</div>")
+  local close_block = pandoc.RawBlock("markdown", "</div>")
   local result = pandoc.Blocks({open_block})
   local insert_content = function()
     if pandoc.utils.type(float.content) == "Block" then

tests/docs/smoke-all/2024/01/18/docusaurus/callouts.mdx.snapshot

@@ -0,0 +1,21 @@
+---
+title: Callouts
+format: docusaurus-md
+---
+
+
+
+
+:::note[A small note]
+
+You should note that this is a note.
+
+:::
+
+Another one without title
+
+:::warning
+
+You should note that this is a note.
+
+:::

tests/docs/smoke-all/2024/01/18/docusaurus/callouts.qmd

@@ -4,9 +4,7 @@ format: docusaurus-md
 _quarto:
   tests:
     docusaurus-md:
-      ensureFileRegexMatches:
-        - [":::note\\[A small note\\]"]
-        - []
+      ensureSnapshotMatches: true
 ---
 
 ::: {.callout-note}
@@ -15,4 +13,13 @@ _quarto:
 
 You should note that this is a note.
 
-:::
+:::
+
+Another one without title
+
+::: {.callout-warning}
+
+You should note that this is a note.
+
+:::
+