Fix typo in turtledemo.two_canvases. (GH-25194)

(cherry picked from commit 4e2ef7084185d2220003b4b5538e3d8190b2dcd6)

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

diff --git a/Lib/turtledemo/two_canvases.py b/Lib/turtledemo/two_canvases.py
index d579876616ff97ea23cf309412c8f8b5f5bcd286..f3602585ab0592c393fbe9526cb5aae4ae902f6c 100755 (executable)
--- a/Lib/turtledemo/two_canvases.py
+++ b/Lib/turtledemo/two_canvases.py
@@ -1,7 +1,7 @@
 """turtledemo.two_canvases
 
 Use TurtleScreen and RawTurtle to draw on two
-distinct canvases in a separate windows. The
+distinct canvases in a separate window. The
 new window must be separately closed in
 addition to pressing the STOP button.
 """