feat(export/md): remove trilium language tag for code blocks

spec/services/export/md.spec.ts

@@ -21,4 +21,21 @@ describe("Markdown export", () => {
 
         expect(markdownExportService.toMarkdown(html)).toBe(expected);
     });
+
+    it("removes auto tag for code blocks", () => {
+        const html = trimIndentation`\
+            <pre><code class="language-text-x-trilium-auto">Hello
+            -world
+            +worldy
+            </code></pre>`;
+        const expected = trimIndentation`\
+            \`\`\`
+            Hello
+            -world
+            +worldy
+
+            \`\`\``;
+
+        expect(markdownExportService.toMarkdown(html)).toBe(expected);
+    })
 });

src/services/export/md.ts

@@ -41,6 +41,10 @@ function toMarkdown(content: string) {
 }
 
 function rewriteLanguageTag(source: string) {
+    if (source === "text-x-trilium-auto") {
+        return "";
+    }
+
     return source
         .split("-")
         .at(-1);