ruff(test_window) Fix nits

tests/legacy_api/test_window.py:70:34: RUF040 Non-string literal used as assert message
   |
68 |     # len(session.attached_window.panes))
69 |
70 |     assert len(session.windows), 1
   |                                  ^ RUF040
71 |     assert len(session.attached_window.panes) == 1
72 |     for w in session.windows:
   |

tests/test_window.py:76:34: RUF040 Non-string literal used as assert message
   |
74 |     # len(session.active_window.panes))
75 |
76 |     assert len(session.windows), 1
   |                                  ^ RUF040
77 |     assert len(session.active_window.panes) == 1
78 |     for w in session.windows:
   |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    Found 2 errors.
72 files left unchanged

Author: tony

tests/legacy_api/test_window.py

@@ -67,7 +67,7 @@ def test_fresh_window_data(session: Session) -> None:
     assert isinstance(session.server, Server)
     # len(session.attached_window.panes))
 
-    assert len(session.windows), 1
+    assert len(session.windows) == 1
     assert len(session.attached_window.panes) == 1
     for w in session.windows:
         assert isinstance(w, Window)

tests/test_window.py

@@ -73,7 +73,7 @@ def test_fresh_window_data(session: Session) -> None:
     assert isinstance(session.server, Server)
     # len(session.active_window.panes))
 
-    assert len(session.windows), 1
+    assert len(session.windows) == 1
     assert len(session.active_window.panes) == 1
     for w in session.windows:
         assert isinstance(w, Window)