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I'm converting a big Python program to Ruby which uses lots of regexps, and
I'm getting some odd errors. One problem seems to be that \1 in the
replacement string doesn't always work. Are there any known "gotchas"
between Python's regexps and Ruby's?

And what's the most robust way to convert "underlined" words to HTML italics
using a regexp? Something like: "This _word_ is in italics." -> "This
<i>word</i> is in italics."

Thanks!

Mike Steiner

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