fix: Images in lists on shared documents sometimes render as code blocks

shared/editor/lib/markdown/serializer.ts

@@ -62,6 +62,7 @@ export class MarkdownSerializer {
 // node and mark serialization methods (see `toMarkdown`).
 export class MarkdownSerializerState {
   inTable = false;
+  inList = false;
   inTightList = false;
   closed = false;
   delim = "";

shared/editor/nodes/Image.tsx

@@ -297,8 +297,12 @@ export default class Image extends SimpleImage {
   );
 
   toMarkdown(state: MarkdownSerializerState, node: ProsemirrorNode) {
-    let markdown =
-      " ![" +
+    // Skip the preceding space for images at the start of a list item or Markdown parsers may
+    // render them as code blocks
+    let markdown = state.inList ? "" : " ";
+
+    markdown +=
+      "![" +
       state.esc((node.attrs.alt || "").replace("\n", "") || "", false) +
       "](" +
       state.esc(node.attrs.src || "", false);