Here's a how to add some HTML formatting to your comment:

<strong></strong> to make things bold
<em></em> to emphasize
<ul><li> or <ol><li> to make lists
<h3> or <h4> to make headings
<pre></pre> for code blocks
<code></code> for a few words of code
<a></a> for links
<img> to paste in an image
<blockquote></blockquote> to quote somebody
:)
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