consistent representations

Author: radoering

src/poetry/core/constraints/generic/constraint.py

@@ -214,6 +214,7 @@ def __hash__(self) -> int:
         return hash((self._operator, self._value))
 
     def __str__(self) -> str:
-        space = " " if self._operator in {"in", "not in"} else ""
+        if self._operator in {"in", "not in"}:
+            return f"'{self._value}' {self._operator}"
         op = self._operator if self._operator != "==" else ""
-        return f"{op}{space}{self._value}"
+        return f"{op}{self._value}"

tests/version/test_markers.py

@@ -114,8 +114,8 @@ def test_parse_marker(marker: str) -> None:
             "platform_machine",
             "!=aarch64, !=loongarch64",
         ),
-        ('"tegra" not in platform_release', "platform_release", "not in tegra"),
-        ('"rpi-v8" in platform_release', "platform_release", "in rpi-v8"),
+        ('"tegra" not in platform_release', "platform_release", "'tegra' not in"),
+        ('"rpi-v8" in platform_release', "platform_release", "'rpi-v8' in"),
     ],
 )
 def test_parse_single_marker(