/usr/lib/ruby/1.8/yaml/encoding.rb is in libruby1.8 1.8.7.352-2ubuntu1.6.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# Handle Unicode-to-Internal conversion
#
module YAML
#
# Escape the string, condensing common escapes
#
def YAML.escape( value, skip = "" )
value.gsub( /\\/, "\\\\\\" ).
gsub( /"/, "\\\"" ).
gsub( /([\x00-\x1f])/ ) do
skip[$&] || ESCAPES[ $&.unpack("C")[0] ]
end
end
#
# Unescape the condenses escapes
#
def YAML.unescape( value )
value.gsub( /\\(?:([nevfbart\\])|0?x([0-9a-fA-F]{2})|u([0-9a-fA-F]{4}))/ ) {
if $3
["#$3".hex ].pack('U*')
elsif $2
[$2].pack( "H2" )
else
UNESCAPES[$1]
end
}
end
end
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