Address some small type annotation issues (#144)

xref gh-143

Author: rgommers

spec/API_specification/array_object.md

@@ -566,7 +566,7 @@ Returns `x[key]`.
 
     -   array instance.
 
--   **key**: _Union\[ int, slice, Tuple\[ Union\[ int, slice ], ... ], <array> ]_
+-   **key**: _Union\[ int, slice, ellipsis, Tuple\[ Union\[ int, slice, ellipsis ], ... ], <array> ]_
 
     -   index key.
 

spec/API_specification/data_type_functions.md

@@ -21,7 +21,7 @@ Machine limits for floating-point data types.
 
 #### Returns
 
--   **out**: _<class>_
+-   **out**: _<finfo object>_
 
     -   an object having the following attributes:
 
@@ -47,7 +47,7 @@ Machine limits for integer data types.
 
 #### Returns
 
--   **out**: _<class>_
+-   **out**: _<iinfo object>_
 
     -   a class with that encapsules the following attributes:
 

spec/API_specification/manipulation_functions.md

@@ -19,7 +19,7 @@ Joins a sequence of arrays along an existing axis.
 
 #### Parameters
 
--   **arrays**: _Tuple\[ <array> ]_
+-   **arrays**: _Tuple\[ <array>, ... ]_
 
     -   input arrays to join. The arrays must have the same shape, except in the dimension specified by `axis`.
 
@@ -154,7 +154,7 @@ Joins a sequence of arrays along a new axis.
 
 #### Parameters
 
--   **arrays**: _Tuple\[ <array> ]_
+-   **arrays**: _Tuple\[ <array>, ... ]_
 
     -   input arrays to join. Each array must have the same shape.