Fix lint issues in test files

- Remove whitespace from blank lines
- Fix formatting according to project standards

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: robtaylor

tests/test_pin_lock.py

@@ -165,15 +165,15 @@ def test_allocate_pins_port(self):
 
         # Check remaining pins
         self.assertEqual(remaining_pins, pins[3:])
-        
+
     def test_allocate_pins_invalid_type(self):
         """Test allocate_pins with an invalid member type"""
         # Create member data with an invalid type - not 'interface' or 'port'
         member_data = {
             "type": "invalid_type"
         }
         pins = ["pin1", "pin2", "pin3"]
-        
+
         # This should cause the function to raise an AssertionError at the "assert False" line
         with self.assertRaises(AssertionError):
             allocate_pins("test_invalid", member_data, pins)
@@ -230,7 +230,7 @@ def test_lock_pins_no_pins_allocated(self, mock_lock_file, mock_package_defs,
 
         # Setup mocks
         mock_exists.return_value = False  # No existing pins.lock
-        
+
         # Mock config
         mock_config = {
             "chipflow": {
@@ -277,7 +277,7 @@ def test_lock_pins_no_pins_allocated(self, mock_lock_file, mock_package_defs,
                 lock_pins()
 
             self.assertIn("No pins were allocated", str(cm.exception))
-            
+
     @mock.patch("builtins.open", new_callable=mock.mock_open)
     @mock.patch("chipflow_lib.pin_lock._parse_config")
     @mock.patch("chipflow_lib.pin_lock.top_interfaces")
@@ -298,7 +298,7 @@ def test_lock_pins_interface_size_change(self, mock_lock_file, mock_package_defs
         # Setup mocks
         mock_exists.return_value = True  # Existing pins.lock
         mock_read_text.return_value = '{"mock": "json"}'
-        
+
         # Mock config
         mock_config = {
             "chipflow": {
@@ -319,12 +319,12 @@ def test_lock_pins_interface_size_change(self, mock_lock_file, mock_package_defs
         mock_old_lock = mock.MagicMock()
         mock_old_lock.package = mock.MagicMock()
         mock_old_lock.package.check_pad.return_value = None  # No conflicts
-        
+
         # Create a port map that will have a different size than the new interface
         existing_ports = {
             "tx": mock.MagicMock(pins=["10"]),  # Only 1 pin
         }
-        
+
         # Setup the port_map to return these ports
         mock_port_map = mock.MagicMock()
         mock_port_map.get_ports.return_value = existing_ports
@@ -617,7 +617,7 @@ def __init__(self):
         # Setup package
         mock_package = mock.MagicMock()
         mock_package.check_pad.return_value = MockConflictPort()
-        
+
         # Configure mock for both dict and Pydantic model compatibility
         mock_old_lock.configure_mock(package=mock_package)
         mock_validate_json.return_value = mock_old_lock
@@ -685,11 +685,11 @@ def test_lock_pins_reuse_existing_ports(self, mock_lock_file, mock_package_defs,
 
         # Mock LockFile instance for existing lock
         mock_old_lock = mock.MagicMock()
-        
+
         # Setup package
         mock_package = mock.MagicMock()
         mock_package.check_pad.return_value = None  # No conflicting pads
-        
+
         # Configure mock for both dict and Pydantic model compatibility
         mock_old_lock.configure_mock(package=mock_package)
 

tests/test_steps_silicon.py

@@ -483,7 +483,7 @@ def test_elaborate(self, mock_top_interfaces):
             platform.pinlock.port_map = mock_port_map
         else:
             platform.pinlock.configure_mock(port_map=mock_port_map)
-        
+
         platform.ports = {
             "test_port": mock.MagicMock(),
             "heartbeat": mock.MagicMock()