old_contents: #!/usr/bin/env python
  # Build the project on AppVeyor.
  
  import os
  from subprocess import check_call
  
  build = os.environ['BUILD']
  config = os.environ['CONFIG']
  cmake_command = ['cmake', '-DFMT_EXTRA_TESTS=ON', '-DCMAKE_BUILD_TYPE=' + config]
  if build == 'mingw':
    cmake_command.append('-GMinGW Makefiles')
    build_command = ['mingw32-make', '-j4']
    test_command = ['mingw32-make', 'test']
    # Remove the path to Git bin directory from $PATH because it breaks MinGW config.
    path = os.environ['PATH'].replace(r'C:\Program Files (x86)\Git\bin', '')
  else:
    build_command = ['msbuild', '/m:4', '/p:Config=' + config, 'FORMAT.sln']
    test_command = ['msbuild', 'RUN_TESTS.vcxproj']
  
  check_call(cmake_command)
  check_call(build_command)
  check_call(test_command)
  
new_contents: #!/usr/bin/env python
  # Build the project on AppVeyor.
  
  import os
  from subprocess import check_call
  
  build = os.environ['BUILD']
  config = os.environ['CONFIG']
  cmake_command = ['cmake', '-DFMT_EXTRA_TESTS=ON', '-DCMAKE_BUILD_TYPE=' + config]
  if build == 'mingw':
    cmake_command.append('-GMinGW Makefiles')
    build_command = ['mingw32-make', '-j4']
    test_command = ['mingw32-make', 'test']
    # Remove the path to Git bin directory from $PATH because it breaks MinGW config.
    os.environ['PATH'] = os.environ['PATH'].replace(r'C:\Program Files (x86)\Git\bin', '')
  else:
    build_command = ['msbuild', '/m:4', '/p:Config=' + config, 'FORMAT.sln']
    test_command = ['msbuild', 'RUN_TESTS.vcxproj']
  
  check_call(cmake_command)
  check_call(build_command)
  check_call(test_command)
  
subject: Fix mingw build, take 2