fixup! feat(Session.new_window): set up environment

Author: zappolowski

tests/test_session.py

@@ -271,7 +271,7 @@ def test_new_window_with_environment(session: Session) -> None:
     window = session.new_window(
         attach=True,
         window_name="window_with_environment",
-        window_shell=f"{env} PS1='$ ' bash --norc --noprofile",
+        window_shell=f"{env} PS1='$ ' sh",
         environment={"ENV_VAR": "window"},
     )
     pane = window.attached_pane
@@ -294,7 +294,7 @@ def test_new_window_with_environment_logs_warning_for_old_tmux(
     session.new_window(
         attach=True,
         window_name="window_with_environment",
-        window_shell=f"{env} PS1='$ ' bash --norc --noprofile",
+        window_shell=f"{env} PS1='$ ' sh",
         environment={"ENV_VAR": "window"},
     )