[Cog] some minor fixes and nits

src/diffusers/pipelines/cogvideo/pipeline_cogvideox_video2video.py

@@ -207,7 +207,9 @@ def __init__(
             tokenizer=tokenizer, text_encoder=text_encoder, vae=vae, transformer=transformer, scheduler=scheduler
         )
         self.latents_in_channels = (
-            self.transformer.config.in_channels if hasattr(self, "transformer") and self.transformer is not None else 16
+            self.transformer.config.in_channels
+            if hasattr(self, "transformer") and self.transformer is not None
+            else 16
         )
         self.vae_scale_factor_spatial = (
             2 ** (len(self.vae.config.block_out_channels) - 1) if hasattr(self, "vae") and self.vae is not None else 8