Flake8 cleanup

prance/cli.py

@@ -107,6 +107,7 @@ def command_invoke(ctx):
 
 from prance.util import default_validation_backend
 
+
 @click.group(cls = GroupWithCommandOptions)
 @click.option(
     '--resolve/--no-resolve',

prance/util/__init__.py

@@ -34,9 +34,7 @@ def stringify_keys(data):
 
 
 def validation_backends():
-  """
-  Return a list of validation backends supported by the environment.
-  """
+  """Return a list of validation backends supported by the environment."""
   ret = []
 
   try:

prance/util/fs.py

@@ -93,10 +93,10 @@ def is_pathname_valid(pathname):
           return False
   # If a "TypeError" exception was raised, it almost certainly has the
   # error message "embedded NUL character" indicating an invalid pathname.
-  except TypeError as exc:
+  except TypeError:
     return False
   # Null-bytes may also cause this, and they are invalid.
-  except ValueError as exc:
+  except ValueError:
     return False
   # If no exception was raised, all path components and hence this
   # pathname itself are valid. (Praise be to the curmudgeonly python.)