mail_to :javascript should use decodeURIComponent instead unescape

If the 'name' parameter for mail_to contains unicode characters, these will not show properly in the link. Solution involves using to_json before outputing each byte.

Example:

mail_to "xxx@example.com", "Écris-nous", :encode=>:javascript

The link's label will show as "Écris-nous".

Solution:

Modify mail_to's code:

-   "document.write('#{content_tag("a", name || email_address, html_options.merge({ "href" => "mailto:"+email_address+extras }))}');".each_byte do |c|
+   "document.write('#{content_tag("a", (name || email_address).to_json[1..-2], html_options.merge({ "href" => "mailto:"+email_address+extras }))}');".each_byte do |c|

Temporary solution for affected users: call to_json yourself, as in:

mail_to "xxx@example.com", "Écris-nous", :encode=>:javascript