AttributeError when out variable is instance of bytes

[ap-Codkelden]

This part of code (striprtf.py, line 113) may cause to an error

AttributeError: 'bytes' object has no attribute 'append'

if out variable is instance of bytes:

elif char in "{}\\":
    if not ignorable:
        out.append(char)

RTF for checkout: http://od.reyestr.court.gov.ua/files/39/29929d5dd1e13dc3e8f448c57051a854.rtf

I think, it can be fixed like this:

if not ignorable:
    if isinstance(out, bytes):
        out = out + char.encode()
    else:
        out.append(char)