old_contents: #!/usr/bin/env python
  #
  # __COPYRIGHT__
  #
  # Permission is hereby granted, free of charge, to any person obtaining
  # a copy of this software and associated documentation files (the
  # "Software"), to deal in the Software without restriction, including
  # without limitation the rights to use, copy, modify, merge, publish,
  # distribute, sublicense, and/or sell copies of the Software, and to
  # permit persons to whom the Software is furnished to do so, subject to
  # the following conditions:
  #
  # The above copyright notice and this permission notice shall be included
  # in all copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
  # KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
  # WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  #
  
  __revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"
  
  """
  Verify that everything works if two multi calls have the same overrides.
  """
  
  import TestSCons
  
  test = TestSCons.TestSCons(match=TestSCons.match_re)
  
  _python_ = TestSCons._python_
  
  test.write('build.py', r"""#!/usr/bin/env python
  import sys
  def build(num, target, source):
      file = open(str(target), 'wb')
      file.write('%s\n'%num)
      for s in source:
          file.write(open(str(s), 'rb').read())
  build(sys.argv[1],sys.argv[2],sys.argv[3:])
  """)
  
  test.write('SConstruct', """\
  B = Builder(action='%(_python_)s build.py $foo $TARGET $SOURCES', multi=1)
  env = Environment(BUILDERS = { 'B' : B })
  env.B(target = 'file4.out', source = 'file4a.in', foo=3)
  env.B(target = 'file4.out', source = 'file4b.in', foo=3)
  """ % locals())
  
  test.write('file4a.in', 'file4a.in\n')
  test.write('file4b.in', 'file4b.in\n')
  
  python_expr = _python_.replace('\\', '\\\\')
  act = TestSCons.re_escape('%s build.py \$foo \$TARGET \$SOURCES' % python_expr)
  
  expect = ("""
  scons: warning: Two different environments were specified for target file4.out,
  \tbut they appear to have the same action: %s
  """ % act) + TestSCons.file_expr
  
  test.run(arguments='file4.out', stderr=expect)
  
  test.must_match('file4.out', "3\nfile4a.in\nfile4b.in\n")
  
  test.pass_test()
  
  # Local Variables:
  # tab-width:4
  # indent-tabs-mode:nil
  # End:
  # vim: set expandtab tabstop=4 shiftwidth=4:
  
new_contents: #!/usr/bin/env python
  #
  # __COPYRIGHT__
  #
  # Permission is hereby granted, free of charge, to any person obtaining
  # a copy of this software and associated documentation files (the
  # "Software"), to deal in the Software without restriction, including
  # without limitation the rights to use, copy, modify, merge, publish,
  # distribute, sublicense, and/or sell copies of the Software, and to
  # permit persons to whom the Software is furnished to do so, subject to
  # the following conditions:
  #
  # The above copyright notice and this permission notice shall be included
  # in all copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
  # KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
  # WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  #
  
  __revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"
  
  """
  Verify that everything works if two multi calls have the same overrides.
  """
  
  import TestSCons
  
  test = TestSCons.TestSCons(match=TestSCons.match_re)
  
  _python_ = TestSCons._python_
  
  test.write('build.py', r"""#!/usr/bin/env python
  import sys
  def build(num, target, source):
      file = open(str(target), 'wb')
      file.write('%s\n'%num)
      for s in source:
          file.write(open(str(s), 'rb').read())
  build(sys.argv[1],sys.argv[2],sys.argv[3:])
  """)
  
  test.write('SConstruct', """\
  B = Builder(action='%(_python_)s build.py $foo $TARGET $SOURCES', multi=1)
  env = Environment(BUILDERS = { 'B' : B })
  env.B(target = 'file4.out', source = 'file4a.in', foo=3)
  env.B(target = 'file4.out', source = 'file4b.in', foo=3)
  """ % locals())
  
  test.write('file4a.in', 'file4a.in\n')
  test.write('file4b.in', 'file4b.in\n')
  
  expect = ("""
  scons: warning: Two different environments were specified for target file4.out,
  \tbut they appear to have the same action: %s build.py .foo .TARGET .SOURCES
  """ % _python_) + TestSCons.file_expr
  
  test.run(arguments='file4.out', stderr=expect)
  
  test.must_match('file4.out', "3\nfile4a.in\nfile4b.in\n")
  
  test.pass_test()
  
  # Local Variables:
  # tab-width:4
  # indent-tabs-mode:nil
  # End:
  # vim: set expandtab tabstop=4 shiftwidth=4:
  
subject: Fix a ripple effect from the change to TestSCons.re_escape().