factory: Fix bad-whitespace pylint error

BUG=chromium:999876
TEST=make lint

Change-Id: Ief3996dfe6eb3e73e45a0701cdcb5cebbde659a9
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/factory/+/1991295
Tested-by: Yilin Yang (kerker) <kerker@chromium.org>
Auto-Submit: Yilin Yang (kerker) <kerker@chromium.org>
Commit-Queue: Yilin Yang (kerker) <kerker@chromium.org>
Reviewed-by: Yong Hong <yhong@chromium.org>
diff --git a/py/tools/regcode.py b/py/tools/regcode.py
index de934e1..8c29492 100755
--- a/py/tools/regcode.py
+++ b/py/tools/regcode.py
@@ -52,8 +52,8 @@
     CmdArg('--seed', '-s', metavar='INT', type=int, default=None,
            help='Seed to use for pseudo-random payload; defaults to clock'))
 def GenerateDummy(options):
-  print ('*** This may be used only to generate a code for testing, '
-         'not for a real device.')
+  print('*** This may be used only to generate a code for testing, '
+        'not for a real device.')
   yes_no = input('*** Are you OK with that? (yes/no) ')
   if yes_no != 'yes':
     print('Aborting.')