Better syncronize async result docs with plain ones.

Removed non-functional method ``merge`` from :class:`_asyncio.AsyncResult`.
This method was non-functional and non-testes since the first introduction
of asyncio in SQLAlchemy.

Fixes: #7158
Fixes: #8952
Change-Id: Ibc3d17be8a8b7cab9bf2074f0408f74b4c4b161d

Author: CaselIT

.gitignore

@@ -39,3 +39,4 @@ test/test_schema.db
 /.pytest_cache
 /db_idents.txt
 .DS_Store
+.vs

doc/build/changelog/unreleased_14/8952.rst

@@ -0,0 +1,8 @@
+.. change::
+    :tags: bug, asyncio
+    :tickets: 8952
+    :versions: 2.0.0b5
+
+    Removed non-functional method ``merge`` from :class:`_asyncio.AsyncResult`.
+    This method was non-functional and non-testes since the first introduction
+    of asyncio in SQLAlchemy.

doc/build/core/connections.rst

@@ -2304,7 +2304,7 @@ Connection / Engine API
     :inherited-members:
 
 
-Result Set  API
+Result Set API
 ---------------
 
 .. autoclass:: ChunkedIteratorResult
@@ -2345,3 +2345,4 @@ Result Set  API
 .. autoclass:: RowMapping
     :members:
 
+.. autoclass:: TupleResult

doc/build/orm/extensions/asyncio.rst

@@ -939,12 +939,17 @@ cursor.
 
 .. autoclass:: AsyncResult
    :members:
+   :inherited-members:
 
 .. autoclass:: AsyncScalarResult
    :members:
+   :inherited-members:
 
 .. autoclass:: AsyncMappingResult
    :members:
+   :inherited-members:
+
+.. autoclass:: AsyncTupleResult
 
 ORM Session API Documentation
 -----------------------------