[3.15] gh-151390: Colorize match + and match - in the REPL (GH-151391) (#151476)

(cherry picked from commit a700732)

Author: johnslavik

Lib/_pyrepl/utils.py

@@ -259,7 +259,7 @@ def is_soft_keyword_used(*tokens: TI | None) -> bool:
             None | TI(T.NEWLINE) | TI(T.INDENT) | TI(string=":"),
             TI(string="match"),
             TI(T.NUMBER | T.STRING | T.FSTRING_START | T.TSTRING_START)
-            | TI(T.OP, string="(" | "*" | "[" | "{" | "~" | "...")
+            | TI(T.OP, string="(" | "*" | "-" | "+" | "[" | "{" | "~" | "...")
         ):
             return True
         case (

Lib/test/test_pyrepl/test_utils.py

@@ -125,6 +125,22 @@ def test_gen_colors_keyword_highlighting(self):
                     ("import", "keyword"),
                 ],
             ),
+            (
+                "match +1",
+                [
+                    ("match", "soft_keyword"),
+                    ("+", "op"),
+                    ("1", "number"),
+                ],
+            ),
+            (
+                "match -1",
+                [
+                    ("match", "soft_keyword"),
+                    ("-", "op"),
+                    ("1", "number"),
+                ],
+            ),
         ]
         for code, expected_highlights in cases:
             with self.subTest(code=code):

Misc/NEWS.d/next/Library/2026-06-12-07-20-08.gh-issue-151390.CmYN9EeJ.rst

@@ -0,0 +1 @@
+Colorize ``match`` in the :term:`REPL` when followed by a unary ``+`` or ``-`` operator. Patch by Bartosz Sławecki.