Add a note about NameError/AttributeError suggestions with custom error functions (pythonGH-26794)

Author: pablogsal

Doc/whatsnew/3.10.rst

@@ -345,6 +345,11 @@ raised from:
 
 (Contributed by Pablo Galindo in :issue:`38530`.)
 
+   .. warning::
+      Notice this won't work if :c:func:`PyErr_Display` is not called to display the error
+      which can happen if some other custom error display function is used. This is a common
+      scenario in some REPLs like IPython.
+
 NameErrors
 ~~~~~~~~~~
 
@@ -362,6 +367,12 @@ was raised from:
 
 (Contributed by Pablo Galindo in :issue:`38530`.)
 
+   .. warning::
+      Notice this won't work if :c:func:`PyErr_Display` is not called to display the error,
+      which can happen if some other custom error display function is used. This is a common
+      scenario in some REPLs like IPython.
+
+
 PEP 626: Precise line numbers for debugging and other tools
 -----------------------------------------------------------