refactor(treewide): formatting and ruff fixes, + manually enabled F401

Signed-off-by: Akhil Narang <me@akhilnarang.dev>
diff --git a/erpnext/stock/tests/test_valuation.py b/erpnext/stock/tests/test_valuation.py
index 4d8990a..47b8f0b 100644
--- a/erpnext/stock/tests/test_valuation.py
+++ b/erpnext/stock/tests/test_valuation.py
@@ -28,9 +28,7 @@
 		self.assertAlmostEqual(sum(q for q, _ in self.queue), qty, msg=f"queue: {self.queue}", places=4)
 
 	def assertTotalValue(self, value):
-		self.assertAlmostEqual(
-			sum(q * r for q, r in self.queue), value, msg=f"queue: {self.queue}", places=2
-		)
+		self.assertAlmostEqual(sum(q * r for q, r in self.queue), value, msg=f"queue: {self.queue}", places=2)
 
 	def test_simple_addition(self):
 		self.queue.add_stock(1, 10)
@@ -210,9 +208,7 @@
 		self.assertAlmostEqual(sum(q for q, _ in self.stack), qty, msg=f"stack: {self.stack}", places=4)
 
 	def assertTotalValue(self, value):
-		self.assertAlmostEqual(
-			sum(q * r for q, r in self.stack), value, msg=f"stack: {self.stack}", places=2
-		)
+		self.assertAlmostEqual(sum(q * r for q, r in self.stack), value, msg=f"stack: {self.stack}", places=2)
 
 	def test_simple_addition(self):
 		self.stack.add_stock(1, 10)
@@ -355,7 +351,6 @@
 			self.assertEqual(stock_queue, expected_queue)
 
 	def test_lifo_values(self):
-
 		in1 = self._make_stock_entry(1, 1)
 		self.assertStockQueue(in1, [[1, 1]])