bpo-14117: Make minor tweaks to turtledemo (GH-8002)

The 'wikipedia' example is now 'rosette', describing what it draws.
The 'penrose' print output is reduced.  The 'tree' '1024'
output is eliminated.
(cherry picked from commit 891a1f8)

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

Lib/turtledemo/penrose.py

@@ -144,9 +144,6 @@ def test(l=200, n=4, fun=sun, startpos=(0,0), th=2):
     draw(l, n, th)
     tracer(1)
     c = clock()
-    print("Calculation:   %7.4f s" % (b - a))
-    print("Drawing:  %7.4f s" % (c - b))
-    print("Together: %7.4f s" % (c - a))
     nk = len([x for x in tiledict if tiledict[x]])
     nd = len([x for x in tiledict if not tiledict[x]])
     print("%d kites and %d darts = %d pieces." % (nk, nd, nk+nd))

Lib/turtledemo/tree.py

@@ -49,7 +49,6 @@ def maketree():
     t = tree([p], 200, 65, 0.6375)
     for x in t:
         pass
-    print(len(p.getscreen().turtles()))
 
 def main():
     a=clock()

Misc/NEWS.d/next/Library/2018-06-29-00-31-36.bpo-14117.3nvDuR.rst

@@ -0,0 +1,3 @@
+Make minor tweaks to turtledemo. The 'wikipedia' example is now 'rosette',
+decribing what it draws.  The 'penrose' print output is reduced. The'1024'
+output of 'tree' is eliminated.