fixing unterminated fsting

tests/io_tests/test_epub_reader.py

@@ -381,8 +381,8 @@ class TestEPUBReader(unittest.TestCase):
             # Each chapter should start with a heading
             first_block = blocks[0]
             self.assertIsInstance(
-                first_block, Heading, f"Chapter {
-                    i + 1} should start with heading")
+                first_block, Heading, f"Chapter {i + 1} should start with heading"
+            )
 
     def test_epub_styled_content(self):
         """Test that styled content in EPUB is properly parsed."""

tests/io_tests/test_html_file_loader.py

@@ -51,8 +51,8 @@ class TestHTMLFileLoader(unittest.TestCase):
             self.assertIsInstance(
                 block,
                 Block,
-                f"Item {i} should be a Block instance, got {
-                    type(block)}")
+                f"Item {i} should be a Block instance, got {type(block)}"
+            )
 
         print(f"Successfully loaded and parsed HTML file with {len(blocks)} blocks")