old_contents: #!/usr/bin/env python
  # Build the project on AppVeyor.
  
  from subprocess import check_call
  import os
  
  env = os.environ
  build = env['BUILD']
  if build == 'mingw':
    # Remove path to Git bin directory from $PATH because it breaks MinGW config.
    env['PATH'] = env['PATH'].replace(r'C:\Program Files (x86)\Git\bin', '')
    generator = ['-GMinGW Makefiles']
  check_call(['cmake', '-DFMT_EXTRA_TESTS=ON', '-DCMAKE_BUILD_TYPE=' + env['CONFIG']] + generator, env=env)
  
new_contents: #!/usr/bin/env python
  # Build the project on AppVeyor.
  
  from subprocess import check_call
  import os
  
  env = os.environ
  build = env['BUILD']
  cmake_command = ['cmake', '-DFMT_EXTRA_TESTS=ON', '-DCMAKE_BUILD_TYPE=' + env['CONFIG']]
  if build == 'mingw':
    # Remove path to Git bin directory from $PATH because it breaks MinGW config.
    env['PATH'] = env['PATH'].replace(r'C:\Program Files (x86)\Git\bin', '')
    cmake_command.append('-GMinGW Makefiles')
  check_call(cmake_command, env=env)
  
subject: Fix appveyor script