Allow both US_ASCII and ASCII_8BIT if fs encoding is unset (LANG=C)
Allow both US_ASCII and ASCII_8BIT if fs encoding is unset (LANG=C)

ruby/rubyspec,nobu/rubyspec,ruby/rubyspec,eregon/rubyspec,sgarciac/spec,kachick/rubyspec,nobu/rubyspec,eregon/rubyspec,ruby/spec,wied03/rubyspec,ruby/spec,kachick/rubyspec,eregon/rubyspec,sgarciac/spec,sgarciac/spec,nobu/rubyspec,ruby/spec,kachick/rubyspec,wied03/rubyspec,wied03/rubyspec