address review points, remove tests and update news entry

Author: Aniketsy

Grammar/python.gram

@@ -805,12 +805,6 @@ compare_op_bitwise_or_pair[CmpopExprPair*]:
     | invalid_eqeqeq
 
 eq_bitwise_or[CmpopExprPair*]: '==' a=bitwise_or { _PyPegen_cmpop_expr_pair(p, Eq, a) }
-invalid_eqeqeq:
-    | a='==' b='=' {
-        _PyPegen_tokens_are_adjacent(a, b)
-        ? RAISE_SYNTAX_ERROR_KNOWN_RANGE(a, b, "invalid syntax.  Maybe you meant 'is' instead of '==='?")
-        : NULL
-    }
 noteq_bitwise_or[CmpopExprPair*]:
     | (tok='!=' { _PyPegen_check_barry_as_flufl(p, tok) ? NULL : tok}) a=bitwise_or {_PyPegen_cmpop_expr_pair(p, NotEq, a) }
 lte_bitwise_or[CmpopExprPair*]: '<=' a=bitwise_or { _PyPegen_cmpop_expr_pair(p, LtE, a) }
@@ -1682,3 +1676,10 @@ invalid_bitwise_or:
         ? RAISE_SYNTAX_ERROR_KNOWN_RANGE(b, c, "invalid syntax.  Maybe you meant 'or' or '|' instead of '||'?")
         : NULL
     }
+
+invalid_eqeqeq:
+    | a='==' b='=' {
+        _PyPegen_tokens_are_adjacent(a, b)
+        ? RAISE_SYNTAX_ERROR_KNOWN_RANGE(a, b, "invalid syntax.  Maybe you meant '==' instead of '==='?")
+        : NULL
+    }

Lib/test/test_syntax.py

@@ -3631,37 +3631,13 @@ def test_double_ampersand(self):
             lineno=2,
             end_lineno=2,
             offset=5,
-        )
-
-    def test_diamond_operator(self):
-        self._check_error(
-            "1<>2",
-            "invalid syntax",
-            lineno=1,
-            end_lineno=1,
-            offset=2,
-            end_offset=4,
-        )
-
-    def test_diamond_operator_barry_as_flufl(self):
-        # Under barry_as_FLUFL, '<>' is the valid "not equal" operator
-        compile(
-            "from __future__ import barry_as_FLUFL\n1<>2",
-            "<test>", "exec",
-        )
-        self._check_error(
-            "from __future__ import barry_as_FLUFL\na < > b",
-            "invalid syntax",
-            lineno=2,
-            end_lineno=2,
-            offset=5,
             end_offset=6,
         )
 
     def test_triple_equal(self):
         self._check_error(
             "a === b",
-            r"Maybe you meant 'is' instead of '==='\?",
+            r"Maybe you meant '==' instead of '==='\?",
             lineno=1,
             end_lineno=1,
             offset=3,

Misc/NEWS.d/next/Core_and_Builtins/2026-06-12-03-41-39.gh-issue-151303.mzlJxi.rst

@@ -1 +1 @@
-Improve :exc:`SyntaxError` messages for common operator typos coming from other languages: ``=<``, ``=>``, and ``=!`` now suggest ``<=``, ``>=``, and ``!=`` respectively, ``===`` suggests ``is``, and ``<>`` shows a tailored message suggesting ``!=``.
+Improve :exc:`SyntaxError` messages for common operator typos coming from other languages: ``=<``, ``=>``, and ``=!`` now suggest ``<=``, ``>=``, and ``!=`` respectively, and ``===`` suggests ``==``.