handle filenames above the triple quotes

aider/utils.py

@@ -174,9 +174,11 @@ def find_original_update_blocks(content):
 
             processed.append(cur)  # original_marker
 
-            filename = processed[-2].splitlines()[-1]
+            filename = processed[-2].splitlines()[-1].strip()
             if not len(filename) or "`" in filename:
-                raise ValueError(f"Bad/missing filename: {filename}")
+                filename = processed[-2].splitlines()[-2].strip()
+                if not len(filename) or "`" in filename:
+                    raise ValueError(f"Bad/missing filename. It should go right above {ORIGINAL}")
 
             original_text = pieces.pop()
             processed.append(original_text)

tests/test_utils.py

@@ -54,6 +54,25 @@ Tooooo
 >>>>>>> UPDATED
 ```
 
+Hope you like it!
+"""
+
+        edits = list(utils.find_original_update_blocks(edit))
+        self.assertEqual(edits, [("foo.txt", "Two\n", "Tooooo\n")])
+
+    def test_find_original_update_blocks_quote_below_filename(self):
+        edit = """
+Here's the change:
+
+foo.txt
+```text
+<<<<<<< ORIGINAL
+Two
+=======
+Tooooo
+>>>>>>> UPDATED
+```
+
 Hope you like it!
 """