bpo-40431: Fix syntax typo in turtledemo (GH-19777)

***   File "/usr/lib64/python3.9/turtledemo/__main__.py", line 275
        bg="#d00" if clear == NORMAL else"#fca")
                                        ^
    SyntaxError: invalid string prefix

Author: hroncok

Lib/turtledemo/__main__.py

@@ -272,7 +272,7 @@ def configGUI(self, start, stop, clear, txt="", color="blue"):
         self.stop_btn.config(state=stop,
                              bg="#d00" if stop == NORMAL else "#fca")
         self.clear_btn.config(state=clear,
-                              bg="#d00" if clear == NORMAL else"#fca")
+                              bg="#d00" if clear == NORMAL else "#fca")
         self.output_lbl.config(text=txt, fg=color)
 
     def makeLoadDemoMenu(self, master):

Misc/NEWS.d/next/Tools-Demos/2020-04-29-01-32-17.bpo-40431.B_aEZ0.rst

@@ -0,0 +1 @@
+Fix a syntax typo in ``turtledemo`` that now raises a ``SyntaxError``.