Change logging statements to not use the "%" operator.

third_party/WebKit/Tools/Scripts/webkitpy/tool/commands/command.py

 # Copyright (c) 2016 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 89 matching lines @@
             usage_string += " [options]"
         if self.argument_names:
             usage_string += " " + self.argument_names
         return usage_string
 
     def parse_args(self, args):
         return self.option_parser.parse_args(args)
 
     def check_arguments_and_execute(self, options, args, tool=None):
         if len(args) < len(self.required_arguments):
-            _log.error("%s required, %s provided.  Provided: %s  Required: %s\nSee '%s help %s' for usage." % (
+            _log.error("%s required, %s provided.  Provided: %s  Required: %s\nSee '%s help %s' for usage.",
                        pluralize("argument", len(self.required_arguments)),
                        pluralize("argument", len(args)),
                        "'%s'" % " ".join(args),
                        " ".join(self.required_arguments),
                        tool.name(),
-                       self.name))
+                       self.name)
             return 1
         return self.execute(options, args, tool) or 0
 
     def standalone_help(self):
         help_text = self.name_with_arguments().ljust(len(self.name_with_arguments()) + 3) + self.help_text + "\n\n"
         if self.long_help:
             help_text += "%s\n\n" % self.long_help
         help_text += self.option_parser.format_option_help(optparse.IndentedHelpFormatter())
         return help_text
 
@@ skipping 20 matching lines @@
         # This method is overridden to add this one line to the output:
         error_message += "\nType \"%s --help\" to see usage.\n" % self.get_prog_name()
         self.exit(1, error_message)
 
     # We override format_epilog to avoid the default formatting which would paragraph-wrap the epilog
     # and also to allow us to compute the epilog lazily instead of in the constructor (allowing it to be context sensitive).
     def format_epilog(self, epilog):  # pylint: disable=unused-argument
         if self.epilog_method:
             return "\n%s\n" % self.epilog_method()
         return ""