bpo-43149: Correct the syntax error message for multiple exception types (GH-25996) GH-25997)

Automerge-Triggered-By: GH:pablogsal
(cherry picked from commit 6692dc1ca99fb34a19d0a4b93cf8e10619490001)

Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>

Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
diff --git a/Lib/test/test_syntax.py b/Lib/test/test_syntax.py
index 9799697..5840721 100644
--- a/Lib/test/test_syntax.py
+++ b/Lib/test/test_syntax.py
@@ -1068,7 +1068,7 @@
      ...
    SyntaxError: invalid syntax
 
-Check that an exception group with missing parentheses
+Check that an multiple exception types with missing parentheses
 raise a custom exception
 
    >>> try:
@@ -1076,21 +1076,21 @@
    ... except A, B:
    ...   pass
    Traceback (most recent call last):
-   SyntaxError: exception group must be parenthesized
+   SyntaxError: multiple exception types must be parenthesized
 
    >>> try:
    ...   pass
    ... except A, B, C:
    ...   pass
    Traceback (most recent call last):
-   SyntaxError: exception group must be parenthesized
+   SyntaxError: multiple exception types must be parenthesized
 
    >>> try:
    ...   pass
    ... except A, B, C as blech:
    ...   pass
    Traceback (most recent call last):
-   SyntaxError: exception group must be parenthesized
+   SyntaxError: multiple exception types must be parenthesized
 
    >>> try:
    ...   pass
@@ -1099,7 +1099,7 @@
    ... finally:
    ...   pass
    Traceback (most recent call last):
-   SyntaxError: exception group must be parenthesized
+   SyntaxError: multiple exception types must be parenthesized
 
 
 >>> f(a=23, a=234)