refactor: improve code formatting (livepeer#99)

This commit applies some small code and documentation formatting
improvements.

runner/app/pipelines/image_to_image.py

@@ -52,6 +52,9 @@ def __init__(self, model_id: str):
             repo_id=model_id, repo_type="model"
         )
         folder_path = os.path.join(get_model_dir(), folder_name)
+        # Load the fp16 variant if fp16 'safetensors' files are present in the cache.
+        # NOTE: Exception for SDXL-Lightning model: despite having fp16 'safetensors'
+        # files, they are not named according to the standard convention.
         has_fp16_variant = (
             any(
                 ".fp16.safetensors" in fname

runner/app/pipelines/text_to_image.py

@@ -30,9 +30,9 @@ def __init__(self, model_id: str):
             repo_id=model_id, repo_type="model"
         )
         folder_path = os.path.join(get_model_dir(), folder_name)
-        # Load fp16 variant if fp16 safetensors files are found in cache
-        # Special case SDXL-Lightning because the safetensors files are fp16 but are not
-        # named properly right now
+        # Load the fp16 variant if fp16 'safetensors' files are present in the cache.
+        # NOTE: Exception for SDXL-Lightning model: despite having fp16 'safetensors'
+        # files, they are not named according to the standard convention.
         has_fp16_variant = (
             any(
                 ".fp16.safetensors" in fname

runner/dev/README.md

@@ -42,7 +42,7 @@ To debug the AI runner when it operates within a container orchestrated by exter
    cd .. && git apply ./runner/dev/patches/debug.patch && cd runner
    ```
 
-5. **Attach and Debug**: Follow the [guidance on attaching to a running container](https://code.visualstudio.com/docs/python/debugging#_command-line-debugging) for details. To attach to the AI runner, use the following configuration:
+5. **Attach and Debug**: Debugging the AI runner involves attaching to an active container. Ensure that VSCode is open in the `runner` directory. Follow these [instructions to attach to a running container](https://code.visualstudio.com/docs/python/debugging#_command-line-debugging) with the appropriate configuration:
 
    ```json
    {