Clarify message about inconsistent lock file

As discussed in python-poetry#8737 (comment)

src/poetry/console/commands/check.py

@@ -147,7 +147,7 @@ def handle(self) -> int:
             check_result["errors"] += ["poetry.lock was not found."]
         if self.poetry.locker.is_locked() and not self.poetry.locker.is_fresh():
             check_result["errors"] += [
-                "poetry.lock is not consistent with pyproject.toml. Run `poetry"
+                "pyproject.toml changes significantly since poetry.lock was generated. Run `poetry"
                 " lock [--no-update]` to fix it."
             ]
 

src/poetry/console/commands/lock.py

@@ -44,7 +44,7 @@ def handle(self) -> int:
                 return 0
             self.line_error(
                 "<error>"
-                "Error: poetry.lock is not consistent with pyproject.toml. "
+                "Error: pyproject.toml changes significantly since poetry.lock was generated. "
                 "Run `poetry lock [--no-update]` to fix it."
                 "</error>"
             )

src/poetry/installation/installer.py

@@ -246,7 +246,7 @@ def _do_install(self) -> int:
 
             if not self._locker.is_fresh():
                 raise ValueError(
-                    "poetry.lock is not consistent with pyproject.toml. "
+                    "pyproject.toml changes significantly since poetry.lock was generated. "
                     "Run `poetry lock [--no-update]` to fix it."
                 )
 

tests/console/commands/test_check.py

@@ -171,7 +171,7 @@ def test_check_lock_outdated(
     tester = command_tester_factory("check", poetry=poetry_with_outdated_lockfile)
     status_code = tester.execute(options)
     expected = (
-        "Error: poetry.lock is not consistent with pyproject.toml. "
+        "Error: pyproject.toml changes significantly since poetry.lock was generated. "
         "Run `poetry lock [--no-update]` to fix it.\n"
     )
 

tests/console/commands/test_lock.py

@@ -106,7 +106,7 @@ def test_lock_check_outdated_legacy(
     status_code = tester.execute("--check")
     expected = (
         "poetry lock --check is deprecated, use `poetry check --lock` instead.\n"
-        "Error: poetry.lock is not consistent with pyproject.toml. "
+        "Error: pyproject.toml changes significantly since poetry.lock was generated. "
         "Run `poetry lock [--no-update]` to fix it.\n"
     )
 

tests/installation/test_installer.py

@@ -220,7 +220,7 @@ def test_not_fresh_lock(installer: Installer, locker: Locker) -> None:
     with pytest.raises(
         ValueError,
         match=re.escape(
-            "poetry.lock is not consistent with pyproject.toml. "
+            "pyproject.toml changes significantly since poetry.lock was generated. "
             "Run `poetry lock [--no-update]` to fix it."
         ),
     ):