discourse/lib/freedom_patches/scrub.rb

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class String
# A poor man's scrub, Ruby 2.1 has a much better implementation, but this will do
unless method_defined? :scrub
def scrub(replace_char=nil)
str = dup.force_encoding("utf-8")
unless str.valid_encoding?
# work around bust string with a double conversion
str.encode!("utf-16","utf-8",:invalid => :replace)
str.encode!("utf-8","utf-16")
end
str
end
end
end