title: output_safety.rb:34 warning: regexp match /.../n against to UTF-8 string
body: <p>When starting up my WEBrick server, I get next warning when calling the home page:</p>
  
  <pre><code>c:/Program Files/jruby-1.6.7/lib/ruby/gems/1.8/gems/activesupport-
    3.2.2.rc1/lib/active_support/core_ext/string/output_safety.rb:34 
    warning: regexp match /.../n against to UTF-8 string
  </code></pre>
  
  <p>Can someone tell me why I'm getting this warning?</p>
  
  <p>+</p>
  
  <p>I'm running JRuby in 1.9 mode, but here I'm getting an error from a gem in 1.8 folder. Why is that? Shouldn't the gems from the 1.9 folder be used?</p>