old_contents: LICENSE_FAMILIES = set("""
  AGPL
  GPL2
  GPL3
  LGPL
  BSD
  MIT
  Apache
  PSF
  Public-Domain
  Proprietary
  Other
  """.split())
  
  FIELDS = {
      'package': {'name', 'version'},
      'source': {'fn', 'url', 'md5', 'sha1', 'sha256',
                 'git_url', 'git_tag', 'git_branch',
                 'patches', 'hg_url', 'hg_tag'},
      'build': {'features', 'track_features',
                'number', 'entry_points', 'osx_is_app', 'noarch',
                'preserve_egg_dir', 'win_has_prefix', 'no_link',
                'ignore_prefix_files', 'msvc_compiler', 'skip_compile_pyc',
                'detect_binary_files_with_prefix', 'script',
                'always_include_files', 'binary_relocation',
                'binary_has_prefix_files'},
      'requirements': {'build', 'run'},
      'app': {'entry', 'icon', 'summary', 'type', 'cli_opts'},
      'test': {'requires', 'commands', 'files', 'imports'},
      'about': {'license', 'license_url', 'license_family', 'license_file',
                'summary', 'description', 'home', 'doc_url', 'doc_source_url',
                'dev_url'},
  }
  
  MAGIC_HEADERS = {
      '\xca\xfe\xba\xbe': 'MachO-universal',
      '\xce\xfa\xed\xfe': 'MachO-i386',
      '\xcf\xfa\xed\xfe': 'MachO-x86_64',
      '\xfe\xed\xfa\xce': 'MachO-ppc',
      '\xfe\xed\xfa\xcf': 'MachO-ppc64',
      'MZ\x90\x00': 'DLL',
      '\x7fELF': 'ELF',
  }
  
  DLL_TYPES = {
      0x0: 'UNKNOWN', 0x1d3: 'AM33', 0x8664: 'AMD64', 0x1c0: 'ARM',
      0xebc: 'EBC', 0x14c: 'I386', 0x200: 'IA64', 0x9041: 'M32R',
      0x266: 'MIPS16', 0x366: 'MIPSFPU', 0x466: 'MIPSFPU16', 0x1f0: 'POWERPC',
      0x1f1: 'POWERPCFP', 0x166: 'R4000', 0x1a2: 'SH3', 0x1a3: 'SH3DSP',
      0x1a6: 'SH4', 0x1a8: 'SH5', 0x1c2: 'THUMB', 0x169: 'WCEMIPSV2',
  }
  
new_contents: LICENSE_FAMILIES = set("""
  AGPL
  GPL2
  GPL3
  LGPL
  BSD
  MIT
  Apache
  PSF
  Public-Domain
  Proprietary
  Other
  """.split())
  
  FIELDS = {
      'package': {'name', 'version'},
      'source': {'fn', 'url', 'md5', 'sha1', 'sha256',
                 'git_url', 'git_tag', 'git_branch',
                 'patches', 'hg_url', 'hg_tag'},
      'build': {'features', 'track_features',
                'number', 'entry_points', 'osx_is_app', 'noarch',
                'preserve_egg_dir', 'win_has_prefix', 'no_link',
                'ignore_prefix_files', 'msvc_compiler', 'skip_compile_pyc',
                'detect_binary_files_with_prefix', 'script',
                'always_include_files', 'binary_relocation',
                'binary_has_prefix_files'},
      'requirements': {'build', 'run'},
      'app': {'entry', 'icon', 'summary', 'type', 'cli_opts'},
      'test': {'requires', 'commands', 'files', 'source_files', 'imports'},
      'about': {'license', 'license_url', 'license_family', 'license_file',
                'summary', 'description', 'home', 'doc_url', 'doc_source_url',
                'dev_url'},
  }
  
  MAGIC_HEADERS = {
      '\xca\xfe\xba\xbe': 'MachO-universal',
      '\xce\xfa\xed\xfe': 'MachO-i386',
      '\xcf\xfa\xed\xfe': 'MachO-x86_64',
      '\xfe\xed\xfa\xce': 'MachO-ppc',
      '\xfe\xed\xfa\xcf': 'MachO-ppc64',
      'MZ\x90\x00': 'DLL',
      '\x7fELF': 'ELF',
  }
  
  DLL_TYPES = {
      0x0: 'UNKNOWN', 0x1d3: 'AM33', 0x8664: 'AMD64', 0x1c0: 'ARM',
      0xebc: 'EBC', 0x14c: 'I386', 0x200: 'IA64', 0x9041: 'M32R',
      0x266: 'MIPS16', 0x366: 'MIPSFPU', 0x466: 'MIPSFPU16', 0x1f0: 'POWERPC',
      0x1f1: 'POWERPCFP', 0x166: 'R4000', 0x1a2: 'SH3', 0x1a3: 'SH3DSP',
      0x1a6: 'SH4', 0x1a8: 'SH5', 0x1c2: 'THUMB', 0x169: 'WCEMIPSV2',
  }
  
subject: allow test/source_files