PEP 8 compliance.

dcc/fetch.py

@@ -54,11 +54,13 @@ class Fetch(dcc.config.Base):
         if fetcher is None:
             with urllib.request.urlopen(url) as response:
                 return json.loads(response.read())
-        
+
         fetcher_path = shutil.which(fetcher)
         if fetcher_path is None:
             raise Exception(f"Fetch util {fetcher} not found on PATH.")
 
-        proc = subprocess.run([fetcher_path, url], capture_output=True, check = True)
+        proc = subprocess.run(
+            [fetcher_path, url],
+            capture_output=True, check=True
+        )
         return json.loads(proc.stdout)
-