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Switching to multi-line mode using Textmate Regex

So you have a pattern you want to match across multiple lines, and you have a regular expression that matches it.
You will probably be used to doing this in perl like this:
or using regex in ruby like this:
However you have just started to get used to Textmate as an editor and you see it supports regex matching. Why though does it not use /s or /m for multi-line dot matching? The reason is that Textmate uses the Oniguruma regular expression library. Oniguruma requires switching to multi-line mode by using an extended group (?m:) so the dot matches the new line as well. So our pattern would be:
Essentially doing this turns multi-line on for the sub-expression, being some.+?stuff
Make sense? I thought not. Read on about Textmate Regex for more information.

Textmate Posting Hiccup

Forgive my triple Post Hiccup. When Textmate posted my blog posts, I got errors.
Thinking the post had not completed, I retried until I figured out the problem.
If you use WordPress V2.3 and post with Textmate, then don’t try to add a new category when posting an article. You get this problem:

Fatal error: Cannot use object of type WP_Error as array in wp-includes/taxonomy.php on line 1010

Looks like I am not the only one.