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rubyのgsubで \" という文字列の \ はパターンマッチされない

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バックスラッシュがエスケープとして解釈されている様子
以下サンプル

hoge.rb
hoge = 'hogehoge\"'
p hoge.gsub(/ \ \/,'') # -> "hogehoge\""

何で困るかというと、例えば手書きJSONの改行を削除してパースする際にバックスラッシュが残ってしまう

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