diff --git a/graphene/types/enum.py b/graphene/types/enum.py
index 5a21e32f..8c95efbe 100644
--- a/graphene/types/enum.py
+++ b/graphene/types/enum.py
@@ -68,7 +68,7 @@ class EnumMeta(SubclassWithMeta_Meta):
 
 class Enum(six.with_metaclass(EnumMeta, UnmountedType, BaseType)):
     """
-    Enum type defintion
+    Enum type definition
 
     Defines a static set of values that can be provided as a Field, Argument or InputField.
 
@@ -83,9 +83,9 @@ class Enum(six.with_metaclass(EnumMeta, UnmountedType, BaseType)):
     Meta:
         enum (optional, Enum): Python enum to use as a base for GraphQL Enum.
 
-        name (optional, str): the name of the GraphQL type (must be unique in schema). Defaults to class
+        name (optional, str): Name of the GraphQL type (must be unique in schema). Defaults to class
             name.
-        description (optional, str): the description of the GraphQL type in the schema. Defaults to class
+        description (optional, str): Description of the GraphQL type in the schema. Defaults to class
             docstring.
         deprecation_reason (optional, str): Setting this value indicates that the enum is
             depreciated and may provide instruction or reason on how for clients to proceed.
diff --git a/graphene/types/mutation.py b/graphene/types/mutation.py
index 9c7355c9..b238ba14 100644
--- a/graphene/types/mutation.py
+++ b/graphene/types/mutation.py
@@ -29,12 +29,14 @@ class Mutation(ObjectType):
 
     .. code:: python
 
-        class CreatePerson(graphene.Mutation):
-            class Arguments:
-                name = graphene.String()
+        from graphene import Mutation, String, Boolean, Field
 
-            ok = graphene.Boolean()
-            person = graphene.Field(Person)
+        class CreatePerson(Mutation):
+            class Arguments:
+                name = String()
+
+            ok = Boolean()
+            person = Field(Person)
 
             def mutate(parent, info, name):
                 person = Person(name=name)
diff --git a/graphene/types/union.py b/graphene/types/union.py
index 38e4a0a8..194ba1da 100644
--- a/graphene/types/union.py
+++ b/graphene/types/union.py
@@ -29,12 +29,14 @@ class Union(UnmountedType, BaseType):
 
     .. code:: python
 
-        class SearchResult(graphene.Union):
+        from graphene import Union, ObjectType, List
+
+        class SearchResult(Union):
             class Meta:
                 types = (Human, Droid, Starship)
 
-        class Query(graphene.ObjectType):
-            search = graphene.List(SearchResult.Field(
+        class Query(ObjectType):
+            search = List(SearchResult.Field(
                 search_text=String(description='Value to search for'))
             )