Replacing spaces in URL (%20) with mod_rewrite

Hi guys,

I'm trying to rewrite URLs I have at the moment (it's dynamic website, so I can't change the html itself). Some of them have spaces, so users see %20 in the middle of string, it looks pretty messy.

Here are examples of URLs I'm trying to rewrite

http://www.mydomain.com/New%20York.html

http://www.mydomain.com/dancer/New%20York

I tried this:

Options +SymlinksIfOwnerMatch
RewriteEngine on

RewriteCond %{REQUEST_URI} ^(.*)\ (.*)$
RewriteRule ^.*$ %1_%2 [E=space_replacer:%1_%2]
RewriteCond %{ENV:space_replacer} !^$
RewriteCond %{ENV:space_replacer} !^.*\ .*$
RewriteRule ^.*$ %{ENV:space_replacer} [R=301,L]

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but didn't work.

Thanks for help
Tom