old_contents: from __future__ import print_function
  from __future__ import absolute_import
  
  # System modules
  import sys
  
  # Third-party modules
  import six
  
  # LLDB Modules
  import lldb
  from .lldbtest import *
  from . import lldbutil
  
  if sys.platform.startswith('win32'):
      # llvm.org/pr22274: need a pexpect replacement for windows
      class PExpectTest(object):
          pass
  else:
      import pexpect
  
      class PExpectTest(TestBase):
  
          NO_DEBUG_INFO_TESTCASE = True
          PROMPT = str("(lldb) ")
  
          def expect_prompt(self):
              self.child.expect_exact(self.PROMPT)
  
          def launch(self, executable=None, timeout=30, dimensions=None):
              logfile = sys.stdout if self.TraceOn() else None
              args = ['--no-lldbinit', '--no-use-colors']
              for cmd in self.setUpCommands():
                  args += ['-O', cmd]
              if executable is not None:
                  args += ['--file', executable]
              self.child = pexpect.spawn(
                      lldbtest_config.lldbExec, args=args, logfile=logfile,
                      timeout=timeout, dimensions=dimensions)
              self.expect_prompt()
              for cmd in self.setUpCommands():
                  self.child.expect_exact(cmd)
                  self.expect_prompt()
              if executable is not None:
                  self.child.expect_exact("target create")
                  self.child.expect_exact("Current executable set to")
                  self.expect_prompt()
  
          def expect(self, cmd, substrs=None):
              self.child.sendline(cmd)
              if substrs is not None:
                  for s in substrs:
                      self.child.expect_exact(s)
              self.expect_prompt()
  
          def quit(self, gracefully=True):
              self.child.sendeof()
              self.child.close(force=not gracefully)
              self.child = None
  
new_contents: from __future__ import print_function
  from __future__ import absolute_import
  
  # System modules
  import sys
  
  # Third-party modules
  import six
  
  # LLDB Modules
  import lldb
  from .lldbtest import *
  from . import lldbutil
  
  if sys.platform.startswith('win32'):
      # llvm.org/pr22274: need a pexpect replacement for windows
      class PExpectTest(object):
          pass
  else:
      import pexpect
  
      class PExpectTest(TestBase):
  
          NO_DEBUG_INFO_TESTCASE = True
          PROMPT = "(lldb) "
  
          def expect_prompt(self):
              self.child.expect_exact(self.PROMPT)
  
          def launch(self, executable=None, timeout=30, dimensions=None):
              logfile = sys.stdout.buffer if self.TraceOn() else None
              args = ['--no-lldbinit', '--no-use-colors']
              for cmd in self.setUpCommands():
                  args += ['-O', cmd]
              if executable is not None:
                  args += ['--file', executable]
              self.child = pexpect.spawn(
                      lldbtest_config.lldbExec, args=args, logfile=logfile,
                      timeout=timeout, dimensions=dimensions)
              self.expect_prompt()
              for cmd in self.setUpCommands():
                  self.child.expect_exact(cmd)
                  self.expect_prompt()
              if executable is not None:
                  self.child.expect_exact("target create")
                  self.child.expect_exact("Current executable set to")
                  self.expect_prompt()
  
          def expect(self, cmd, substrs=None):
              self.child.sendline(cmd)
              if substrs is not None:
                  for s in substrs:
                      self.child.expect_exact(s)
              self.expect_prompt()
  
          def quit(self, gracefully=True):
              self.child.sendeof()
              self.child.close(force=not gracefully)
              self.child = None
  
subject: Fix 'argument must be str, not bytes' for Python 3.