fix: regression in formatted callout titles

quartz/plugins/transformers/ofm.ts

@@ -383,11 +383,17 @@ export const ObsidianFlavoredMarkdown: QuartzTransformerPlugin<Partial<Options>
                 const calloutType = canonicalizeCallout(typeString.toLowerCase())
                 const collapse = collapseChar === "+" || collapseChar === "-"
                 const defaultState = collapseChar === "-" ? "collapsed" : "expanded"
-                const titleContent =
-                  match.input.slice(calloutDirective.length).trim() || capitalize(calloutType)
+                const titleContent = match.input.slice(calloutDirective.length).trim()
+                const useDefaultTitle = titleContent === "" && restOfTitle.length === 0
                 const titleNode: Paragraph = {
                   type: "paragraph",
-                  children: [{ type: "text", value: titleContent + " " }, ...restOfTitle],
+                  children: [
+                    {
+                      type: "text",
+                      value: useDefaultTitle ? capitalize(calloutType) : titleContent + " ",
+                    },
+                    ...restOfTitle,
+                  ],
                 }
                 const title = mdastToHtml(titleNode)