fix whitespace and file end lints

Author: MeGaGiGaGon

bot/exts/utils/utils.py

@@ -125,10 +125,10 @@ async def zen(
             start_index = int(match.group("start")) if match.group("start") else None
             end_index = int(match.group("end")) if match.group("end") else None
             step_size = int(match.group("step")) if match.group("step") else 1
-            
+
             if step_size == 0:
                 raise BadArgument(f"Step size must not be 0.")
-            
+
             lines = zen_lines[start_index:end_index:step_size]
             if not lines:
                 raise BadArgument(f"Slice returned 0 lines.")

tests/bot/exts/utils/test_utils.py

@@ -91,4 +91,4 @@ async def test_zen_with_invalid_slices(self):
 
         for input_slice in slices:
             with self.subTest(input_slice = input_slice), self.assertRaises(BadArgument):
-                await self.cog.zen.callback(self.cog, self.ctx, search_value=input_slice)
+                await self.cog.zen.callback(self.cog, self.ctx, search_value=input_slice)