add autopep8

Signed-off-by: Jess Frazelle <github@jessfraz.com>

kittycad/models/valid_output_file_format.py

@@ -1,13 +1,12 @@
 from enum import Enum
 
-
 class ValidOutputFileFormat(str, Enum):
-    STL = 'stl'
-    OBJ = 'obj'
-    DAE = 'dae'
-    STEP = 'step'
-    FBX = 'fbx'
-    FBXB = 'fbxb'
+	STL = 'stl'
+	OBJ = 'obj'
+	DAE = 'dae'
+	STEP = 'step'
+	FBX = 'fbx'
+	FBXB = 'fbxb'
 
-    def __str__(self) -> str:
-        return str(self.value)
+	def __str__(self) -> str:
+		return str(self.value)