feat: add handling for identical unspaces fences replacement

Author: maxprilutskiy

.changeset/angry-bugs-vanish.md

@@ -0,0 +1,5 @@
+---
+"lingo.dev": patch
+---
+
+add handling for identical unspaces fences replacement

packages/cli/src/cli/loaders/mdx2/code-placeholder.spec.ts

@@ -222,6 +222,38 @@ describe("MDX Code Placeholder Loader", () => {
       expect(pushed).toBe(md);
     });
 
+    it("handles identical code snippets correctly", async () => {
+      const md = dedent`
+        First paragraph:
+
+        \`\`\`shell
+        echo "hello world"
+        \`\`\`
+
+        Second paragraph:
+        \`\`\`shell
+        echo "hello world"
+        \`\`\`
+      `;
+      const pulled = await loader.pull("en", md);
+      const pushed = await loader.push("es", pulled);
+      expect(pushed).toBe(
+        dedent`
+        First paragraph:
+
+        \`\`\`shell
+        echo "hello world"
+        \`\`\`
+
+        Second paragraph:
+
+        \`\`\`shell
+        echo "hello world"
+        \`\`\`
+      `,
+      );
+    });
+
     it("leaves incomplete fences untouched", async () => {
       const md = "```js\nno close";
       const pulled = await loader.pull("en", md);

packages/cli/src/cli/loaders/mdx2/code-placeholder.ts

@@ -19,8 +19,8 @@ function ensureTrailingFenceNewline(_content: string) {
       const replacement = match.trim().startsWith(">")
         ? match
         : `\n\n${match}\n\n`;
-      content = content.replace(match, replacement);
-      workingContent = workingContent.replace(match, "");
+      content = content.replaceAll(match, replacement);
+      workingContent = workingContent.replaceAll(match, "");
       found = true;
     }
   } while (found);