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# From <https://stackoverflow.com/a/25802375>.
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module Jekyll
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module RegexFilter
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def re_substitute(input, reg_str, repl_str)
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regexp = Regexp.new reg_str, Regexp::MULTILINE
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input.gsub regexp, repl_str
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end
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end
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end
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Liquid::Template.register_filter(Jekyll::RegexFilter)
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