Format code with yapf

This commit fixes the style issues introduced in 3df41f0 according to the output
from yapf.

Details: https://deepsource.io/gh/kokarare1212/librespot-python/transform/8943cbb4-879c-4a5f-8f77-e14c8c5ac178/

docs/conf.py

@@ -20,15 +20,12 @@ project = 'librespot-python'
 copyright = '2021, kokarare1212'
 author = 'kokarare1212'
 
-
 # -- General configuration ---------------------------------------------------
 
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = [
-    'recommonmark'
-]
+extensions = ['recommonmark']
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']
@@ -38,7 +35,6 @@ templates_path = ['_templates']
 # This pattern also affects html_static_path and html_extra_path.
 exclude_patterns = ['_build', 'Thumbs.db', '.DS_Store']
 
-
 # -- Options for HTML output -------------------------------------------------
 
 # The theme to use for HTML and HTML Help pages.  See the documentation for
@@ -51,7 +47,6 @@ html_theme = 'sphinx_rtd_theme'
 # so a file named "default.css" will overwrite the builtin "default.css".
 html_static_path = ['_static']
 
-
 # -- Markdown ----------------------------------------------------------------
 
 source_suffix = ['.rst', '.md']
@@ -59,4 +54,3 @@ source_suffix = ['.rst', '.md']
 source_parsers = {
     '.md': 'recommonmark.parser.CommonMarkParser',
 }
-