[3.9] bpo-33289: Return RGB triplet of ints instead of floats from tkinter.colorchooser (GH-6578). (GH-24318)

(cherry picked from commit 6713e869c4)

Co-authored-by: Cheryl Sabella <cheryl.sabella@gmail.com>

Lib/tkinter/__init__.py

@@ -1160,8 +1160,7 @@ class Misc:
             self.tk.call('winfo', 'reqwidth', self._w))
 
     def winfo_rgb(self, color):
-        """Return tuple of decimal values for red, green, blue for
-        COLOR in this widget."""
+        """Return a tuple of integer RGB values in range(65536) for color in this widget."""
         return self._getints(
             self.tk.call('winfo', 'rgb', self._w, color))