The answer you get is what is expected. What do you think the regex reads like?
Start then capture 1 or more character upto "e" or "r" captured then capture anything left to end.
Remember the match is greedy so matches the "r" in the option rather than the "e".
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<blockquote> <br /> <dd>
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<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
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<sub> <sup> <table>
<td> <th> <tr> <tt>
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
Want more info? How to link or
or How to display code and escape characters
are good places to start.