Fixes artefacts in truncated search results (#3622).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2822 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/helpers/search_helper.rb

@@ -27,8 +27,9 @@ module SearchHelper
         result << '...'
         break
       end
+      words = words.mb_chars
       if i.even?
-        result << h(words.length > 100 ? "#{words[0..44]} ... #{words[-45..-1]}" : words)
+        result << h(words.length > 100 ? "#{words.slice(0..44)} ... #{words.slice(-45..-1)}" : words)
       else
         t = (tokens.index(words.downcase) || 0) % 4
         result << content_tag('span', h(words), :class => "highlight token-#{t}")