Enforce consistent string quoting style

identicon/test_identicon.py

@@ -81,7 +81,7 @@ REFERENCE_ICONS = [
 ]
 
 
-@pytest.mark.parametrize("reference", REFERENCE_ICONS)
+@pytest.mark.parametrize('reference', REFERENCE_ICONS)
 def test_identicon(reference):
     icon = Identicon(reference.fingerprint)
     icon.calculate()

main.py

@@ -42,9 +42,9 @@ def main(**kwargs):
 
 def get_input_stream(kwargs):
     stream = None
-    if (text := kwargs["text"]) is not None:
+    if (text := kwargs['text']) is not None:
         stream = ClosableStream(BytesIO(text.encode()))
-    elif file := kwargs["file"]:
+    elif file := kwargs['file']:
         stream = get_deterministic_stream(file)
     elif not stdin.isatty():
         stream = ClosableStream(stdin.buffer)
@@ -83,7 +83,7 @@ def get_deterministic_tar_stream(file):
     def wait_and_check_exitcode():
         exit_code = p.wait()
         if exit_code != 0:
-            raise RuntimeError(f"Tar failed: {p.stderr.read().decode()}")
+            raise RuntimeError(f'Tar failed: {p.stderr.read().decode()}')
 
     return ClosableStream(p.stdout, wait_and_check_exitcode)