fixcc.py: update for python3
This is the error I was getting:
$ ~/lilypond-src/scripts/auxiliar/fixcc.py ~/lilypond-src/flower/include/rational.hh
Traceback (most recent call last):
File "/home/user/lilypond-src/scripts/auxiliar/fixcc.py", line 550, in <module>
main ()
File "/home/user/lilypond-src/scripts/auxiliar/fixcc.py", line 420, in main
if not check_astyle_version():
File "/home/user/lilypond-src/scripts/auxiliar/fixcc.py", line 409, in check_astyle_version
return (PREFERRED_ASTYLE_VERSION in stderr) \
TypeError: a bytes-like object is required, not 'str'
Edited by Dan Eble