Rename format_full_version to _format_full_version to make it visibly private (#1125)

Author: r266-tech

src/packaging/markers.py

@@ -284,7 +284,7 @@ def _evaluate_markers(
     return any(all(item) for item in groups)
 
 
-def format_full_version(info: sys._version_info) -> str:
+def _format_full_version(info: sys._version_info) -> str:
     version = f"{info.major}.{info.minor}.{info.micro}"
     kind = info.releaselevel
     if kind != "final":
@@ -297,7 +297,7 @@ def default_environment() -> Environment:
 
     This is the base environment used by :meth:`Marker.evaluate`.
     """
-    iver = format_full_version(sys.implementation.version)
+    iver = _format_full_version(sys.implementation.version)
     implementation_name = sys.implementation.name
     return {
         "implementation_name": implementation_name,

tests/test_markers.py

@@ -18,8 +18,8 @@
     InvalidMarker,
     Marker,
     UndefinedComparison,
+    _format_full_version,
     default_environment,
-    format_full_version,
 )
 
 VARIABLES = [
@@ -160,11 +160,11 @@ def test_multidigit_minor_version(self, monkeypatch: pytest.MonkeyPatch) -> None
 
     def tests_when_releaselevel_final(self) -> None:
         v = FakeVersionInfo(3, 4, 2, "final", 0)
-        assert format_full_version(v) == "3.4.2"  # type: ignore[arg-type]
+        assert _format_full_version(v) == "3.4.2"  # type: ignore[arg-type]
 
     def tests_when_releaselevel_not_final(self) -> None:
         v = FakeVersionInfo(3, 4, 2, "beta", 4)
-        assert format_full_version(v) == "3.4.2b4"  # type: ignore[arg-type]
+        assert _format_full_version(v) == "3.4.2b4"  # type: ignore[arg-type]
 
 
 class TestMarker: