Fix push when --out contains the wiki clone directory.

Keep wiki_clone* across convert --clean and skip copying the clone into itself (0.3.5).

Co-authored-by: Cursor <cursoragent@cursor.com>

export1c_help/export.py

@@ -248,7 +248,8 @@ def export_help(
 
     if clean and out_dir.exists():
         for child in out_dir.iterdir():
-            if child.name == ".git":
+            if child.name == ".git" or child.name.startswith("wiki_clone"):
+                # never wipe an in-tree wiki working clone
                 continue
             if child.is_dir():
                 shutil.rmtree(child)