TypeError: startswith first arg must be str or a tuple of str, not bytes

[saddy001]

There's a bug:

python3.7/site-packages/tinycss2/bytes.py", line 33, in decode_stylesheet_bytes
    if css_bytes.startswith(b'@charset "'):
TypeError: startswith first arg must be str or a tuple of str, not bytes

[Guillaume Ayoub]

Sorry for the delay, and thanks for this pull request!

Could you please post the whole backtrace?

[Guillaume Ayoub]

I think that a *_bytes function has been called with str. Please reopen if needed.