feat: add support for real-valued arrays in real and conj

PR-URL: #884
Closes: #824
Co-authored-by: Athan Reines <kgryte@gmail.com>
Reviewed-by: Athan Reines <kgryte@gmail.com> 
Reviewed-by: Ralf Gommers <ralf.gommers@gmail.com>

Author: ev-br

src/array_api_stubs/_draft/elementwise_functions.py

@@ -869,7 +869,7 @@ def conj(x: array, /) -> array:
     Parameters
     ----------
     x: array
-        input array. Should have a complex floating-point data type.
+        input array. Must have a numeric data type.
 
     Returns
     -------
@@ -879,6 +879,8 @@ def conj(x: array, /) -> array:
     Notes
     -----
 
+    -   Whether the returned array and the input array share the same underlying memory is unspecified and thus implementation-defined.
+
     .. versionadded:: 2022.12
     """
 
@@ -2346,7 +2348,7 @@ def real(x: array, /) -> array:
     Parameters
     ----------
     x: array
-        input array. Should have a complex floating-point data type.
+        input array. Must have a numeric data type.
 
     Returns
     -------
@@ -2356,6 +2358,8 @@ def real(x: array, /) -> array:
     Notes
     -----
 
+    -   Whether the returned array and the input array share the same underlying memory is unspecified and thus implementation-defined.
+
     .. versionadded:: 2022.12
     """