Formatting fixes

Author: enwask

devito/ir/iet/visitors.py

@@ -59,6 +59,8 @@ def always_rebuild(self, o, *args, **kwargs):
 
 
 TResult = TypeVar('TResult')
+
+
 class LazyVisitor(GenericVisitor, Generic[TResult]):
 
     """
@@ -1063,7 +1065,7 @@ def __init__(self, mode: str = 'symbolics') -> None:
             self.rule = lambda n: chain(*[self.rules[mode](n) for mode in modes])
 
     def _post_visit(self, ret):
-        return sorted(filter_ordered(ret, key = id), key=str)
+        return sorted(filter_ordered(ret, key=id), key=str)
 
     def visit_tuple(self, o: Sequence[Any]) -> Iterator[Any]:
         for i in o:
@@ -1129,6 +1131,8 @@ def visit_Node(self, o: Node) -> Iterator[Any]:
 
 
 TApp = TypeVar('TApp')
+
+
 class FindApplications(LazyVisitor[set[TApp]]):
 
     """