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/base64.py

@@ -330,11 +330,11 @@ def test():
         opts, args = getopt.getopt(sys.argv[1:], 'deut')
     except getopt.error as msg:
         sys.stdout = sys.stderr
-        print msg
-        print """usage: %s [-d|-e|-u|-t] [file|-]
+        print(msg)
+        print("""usage: %s [-d|-e|-u|-t] [file|-]
         -d, -u: decode
         -e: encode (default)
-        -t: encode and decode string 'Aladdin:open sesame'"""%sys.argv[0]
+        -t: encode and decode string 'Aladdin:open sesame'"""%sys.argv[0])
         sys.exit(2)
     func = encode
     for o, a in opts:
@@ -352,7 +352,7 @@ def test1():
     s0 = "Aladdin:open sesame"
     s1 = encodestring(s0)
     s2 = decodestring(s1)
-    print s0, repr(s1), s2
+    print(s0, repr(s1), s2)
 
 
 if __name__ == '__main__':