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.)

Lib/test/test_threaded_import.py

@@ -28,14 +28,14 @@ def task():
 def test_import_hangers():
     import sys
     if verbose:
-        print "testing import hangers ...",
+        print("testing import hangers ...", end=' ')
 
     import test.threaded_import_hangers
     try:
         if test.threaded_import_hangers.errors:
             raise TestFailed(test.threaded_import_hangers.errors)
         elif verbose:
-            print "OK."
+            print("OK.")
     finally:
         # In case this test is run again, make sure the helper module
         # gets loaded from scratch again.
@@ -61,12 +61,12 @@ def test_main():        # magic name!  see above
     done.acquire()
     for N in (20, 50) * 3:
         if verbose:
-            print "Trying", N, "threads ...",
+            print("Trying", N, "threads ...", end=' ')
         for i in range(N):
             thread.start_new_thread(task, ())
         done.acquire()
         if verbose:
-            print "OK."
+            print("OK.")
     done.release()
 
     test_import_hangers()