Switch back to underline for invalid characters, and make restricted ASCII-only
[youtube-dl] / youtube_dl /
drwxr-xr-x   ..
-rw-r--r-- 24917 FileDownloader.py
-rw-r--r-- 116358 InfoExtractors.py
-rw-r--r-- 7074 PostProcessor.py
-rw-r--r-- 21349 __init__.py
-rwxr-xr-x 108 __main__.py
-rw-r--r-- 10542 utils.py