Refactor imports and remove example comments

Reorder imports and clean up comments in test file.

Author: SergioGarcia00

pandas/tests/io/sql/test_percent_patterns.py

@@ -1,28 +1,26 @@
 from __future__ import annotations
 
-import pytest
 from typing import Any
 
+import pytest
+
 pytest.importorskip("sqlalchemy")
 
 
 def test_modulo_operator(sql_con: Any) -> None:
-    # Example test for modulo operator escaping
     query = "SELECT 10 % 3"
     result = sql_con.execute(query)
     assert result.scalar() == 1
 
 
 def test_like_pattern(sql_con: Any) -> None:
-    # Example test for LIKE pattern with percent signs
     query = "SELECT 'abc' LIKE 'a%'"
     result = sql_con.execute(query)
     assert result.scalar() == 1
 
 
 def test_sqlalchemy_selectable(sql_con: Any) -> None:
-    # Example test using a SQLAlchemy selectable
-    from sqlalchemy import select, literal
+    from sqlalchemy import literal, select
 
     stmt = select(literal("hello"))
     result = sql_con.execute(stmt)