Fix most trivially-findable print statements.

There's one major and one minor category still unfixed:
doctests are the major category (and I hope to be able to augment the
refactoring tool to refactor bona fide doctests soon);
other code generating print statements in strings is the minor category.

(Oh, and I don't know if the compiler package works.)
diff --git a/Lib/idlelib/UndoDelegator.py b/Lib/idlelib/UndoDelegator.py
index 182a117..0f95b3b 100644
--- a/Lib/idlelib/UndoDelegator.py
+++ b/Lib/idlelib/UndoDelegator.py
@@ -38,10 +38,10 @@
     def dump_event(self, event):
         from pprint import pprint
         pprint(self.undolist[:self.pointer])
-        print "pointer:", self.pointer,
-        print "saved:", self.saved,
-        print "can_merge:", self.can_merge,
-        print "get_saved():", self.get_saved()
+        print("pointer:", self.pointer, end=' ')
+        print("saved:", self.saved, end=' ')
+        print("can_merge:", self.can_merge, end=' ')
+        print("get_saved():", self.get_saved())
         pprint(self.undolist[self.pointer:])
         return "break"