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/SocketServer.py

@@ -263,12 +263,12 @@ class BaseServer:
         The default is to print a traceback and continue.
 
         """
-        print '-'*40
-        print 'Exception happened during processing of request from',
-        print client_address
+        print('-'*40)
+        print('Exception happened during processing of request from', end=' ')
+        print(client_address)
         import traceback
         traceback.print_exc() # XXX But this goes to stderr!
-        print '-'*40
+        print('-'*40)
 
 
 class TCPServer(BaseServer):