Code in sitemap instructions differs slightly from vBSEO htaccess file?

In the instructions for installation of the sitemap it gives this as the code for the htaccess:

RewriteEngine On
RewriteRule ^((urllist|sitemap).*\.(xml|txt)(\.gz)?)$ vbseo_sitemap/vbseo_getsitemap.php?sitemap=$1 [L]

In parenthesis it says existing vBSEO users can skip this step. But I looked at my existing htaccess file and this line of code is slightly different:

RewriteEngine On
RewriteRule ^((urllist|sitemap_).*\.(xml|txt)(\.gz)?)$ vbseo_sitemap/vbseo_getsitemap.php?sitemap=$1 [L]

Notice the "_" after sitemap. Is that supposed to be there?

Thanks!

Hi Mike,

That underscore just makes the rule a bit more strict, not a big deal, but it will still work (the .* part means any character that does appear 0 or more times, and it does include alphanumeric characters, symbols [underscore included], etc.).

Thanks for the explanation Andrés! I went ahead and removed the underscore just to be safe (probably was on there since '08).