[3.11] gh-92858: Improve error message for some suites with syntax error before ':' (GH-92894) (#94180)

(cherry picked from commit 2fc83ac3afa161578200dbf8d823a20e0801c0c0)

Co-authored-by: wookie184 <wookie1840@gmail.com>

Co-authored-by: wookie184 <wookie1840@gmail.com>

1 files changed, 31 insertions, 10 deletions

diff --git a/Lib/test/test_syntax.py b/Lib/test/test_syntax.py
index 96e5c12..a9193b0 100644
--- a/Lib/test/test_syntax.py
+++ b/Lib/test/test_syntax.py
@@ -607,7 +607,7 @@ SyntaxError: Generator expression must be parenthesized
 >>> class C(x for x in L):
 ...     pass
 Traceback (most recent call last):
-SyntaxError: expected ':'
+SyntaxError: invalid syntax
 
 >>> def g(*args, **kwargs):
 ...     print(args, sorted(kwargs.items()))
@@ -963,17 +963,22 @@ leading to spurious errors.
      ...
    SyntaxError: cannot assign to function call here. Maybe you meant '==' instead of '='?
 
-    Missing ':' before suites:
+Missing ':' before suites:
 
-    >>> def f()
-    ...     pass
-    Traceback (most recent call last):
-    SyntaxError: expected ':'
+   >>> def f()
+   ...     pass
+   Traceback (most recent call last):
+   SyntaxError: expected ':'
 
-    >>> class A
-    ...     pass
-    Traceback (most recent call last):
-    SyntaxError: expected ':'
+   >>> class A
+   ...     pass
+   Traceback (most recent call last):
+   SyntaxError: expected ':'
+
+   >>> class R&D:
+   ...     pass
+   Traceback (most recent call last):
+   SyntaxError: invalid syntax
 
    >>> if 1
    ...   pass
@@ -1007,6 +1012,11 @@ leading to spurious errors.
    Traceback (most recent call last):
    SyntaxError: expected ':'
 
+   >>> for x in range 10:
+   ...   pass
+   Traceback (most recent call last):
+   SyntaxError: invalid syntax
+
    >>> while True
    ...   pass
    Traceback (most recent call last):
@@ -1052,6 +1062,11 @@ leading to spurious errors.
    Traceback (most recent call last):
    SyntaxError: expected ':'
 
+   >>> with block ad something:
+   ...   pass
+   Traceback (most recent call last):
+   SyntaxError: invalid syntax
+
    >>> try
    ...   pass
    Traceback (most recent call last):
@@ -1070,6 +1085,12 @@ leading to spurious errors.
    Traceback (most recent call last):
    SyntaxError: expected ':'
 
+   >>> match x x:
+   ...   case list():
+   ...       pass
+   Traceback (most recent call last):
+   SyntaxError: invalid syntax
+
    >>> match x:
    ...   case list()
    ...       pass