Tweak comment

Author: brianschubert

mypy/plugin.py

@@ -495,7 +495,7 @@ class MethodContext(NamedTuple):
 class AttributeContext(NamedTuple):
     type: ProperType  # Type of object with attribute
     default_attr_type: Type  # Original attribute type
-    is_lvalue: bool  # Whether the attribute is the target for an assignment
+    is_lvalue: bool  # Whether the attribute is the target of an assignment
     context: Context  # Relevant location context (e.g. for error messages)
     api: CheckerPluginInterface