UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 121: ordinal not in range(128)

[Wartz]

installinstallmacos.py - get macOS installers from the Apple software catalog

This Mac:
Model Identifier : iMac18,2
Bridge ID        : None
Board ID         : Mac-77F17D7DA9285301
OS Version       : 10.13.4
Build ID         : 17E202

Traceback (most recent call last):
  File "installinstallmacos.py", line 1186, in <module>
    main()
  File "installinstallmacos.py", line 827, in main
    catalog, args.workdir, ignore_cache=args.ignore_cache
  File "installinstallmacos.py", line 590, in os_installer_product_info
    board_ids = get_board_ids(dist_path)
  File "installinstallmacos.py", line 486, in get_board_ids
    if "boardIds" in line:
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe2 in position 121: ordinal not in range(128)

[grahampugh]

That's an issue with my fork of installinstallmacos.py so I'll move it there.