Fix doc build warnings (#1985)

* Fix doc build warnings

* Fix mypy error

src/zarr/indexing.py

@@ -1022,9 +1022,9 @@ def __init__(self, selection: CoordinateSelection, shape: ChunkCoords, chunk_gri
 
         # flatten selection
         selection_broadcast = tuple(dim_sel.reshape(-1) for dim_sel in selection_broadcast)
-        chunks_multi_index_broadcast = [
-            dim_chunks.reshape(-1) for dim_chunks in chunks_multi_index_broadcast
-        ]
+        chunks_multi_index_broadcast = tuple(
+            [dim_chunks.reshape(-1) for dim_chunks in chunks_multi_index_broadcast]
+        )
 
         # ravel chunk indices
         chunks_raveled_indices = np.ravel_multi_index(

src/zarr/v2/context.py

@@ -9,8 +9,8 @@ class Context(TypedDict, total=False):
     All keys are optional. Any component reading the context must provide
     a default implementation in the case a key cannot be found.
 
-    Items
-    -----
+    Attributes
+    ----------
     meta_array : array-like, optional
         An array-like instance to use for determining the preferred output
         array type.

src/zarr/v2/indexing.py

@@ -989,7 +989,7 @@ class PartialChunkIterator:
     arr_shape : shape of chunk to select data from
 
     Attributes
-    -----------
+    ----------
     arr_shape
     selection