test(rename_window) Add doctest

Author: tony

libtmux/window.py

@@ -296,6 +296,17 @@ def rename_window(self, new_name: str) -> "Window":
         ----------
         new_name : str
             name of the window
+
+        Examples
+        --------
+
+        >>> window = session.attached_window
+
+        >>> window.rename_window('My project')
+        Window(@1 1:My project, Session($1 ...))
+
+        >>> window.rename_window('New name')
+        Window(@1 1:New name, Session($1 ...))
         """
 
         import shlex