chore: Apply whitespace fixes from hooks

- Remove trailing whitespace
- Correct single newline at end of files (skip for json)
- Update to formatting in a few places due to black

setup.cfg

@@ -2,7 +2,7 @@
 name = dupeGuru
 version = attr: core.__version__
 url = https://github.com/arsenetar/dupeguru
-project_urls = 
+project_urls =
     Bug Reports = https://github.com/arsenetar/dupeguru/issues
 author = Andrew Senetar
 author_email = arsenetar@voltaicideas.net
@@ -28,7 +28,7 @@ classifiers =
 [options]
 packages = find:
 python_requires = >=3.7
-install_requires = 
+install_requires =
     Send2Trash>=1.3.0
     mutagen>=1.45.1
     distro>=1.5.0
@@ -39,7 +39,7 @@ install_requires =
 setup_requires =
     sphinx>=3.0.0
     polib>=1.1.0
-tests_require = 
+tests_require =
     pytest >=6,<7
 include_package_data = true