From: Brian Candler <b.candler@...>
Date: 2009-05-21T18:59:41+09:00
Subject: Re: gsub choking on fixnum

Yukihiro Matsumoto wrote:
> The following patch should work.
...
> index 2bc0042..a4a30b6 100644
> --- a/lib/rexml/text.rb
> +++ b/lib/rexml/text.rb
> @@ -286,7 +286,7 @@ module REXML
>      EREFERENCE = /&(?!#{Entity::NAME};)/
>      # Escapes all possible entities
>      def Text::normalize( input, doctype=nil, entity_filter=nil )
> -      copy = input
> +      copy = input.to_s
>        # Doing it like this rather than in a loop improves the speed
>        #copy = copy.gsub( EREFERENCE, '&amp;' )
>        copy = copy.gsub( "&", "&amp;" )

...which was also posted here
http://groups.google.com/group/comp.lang.ruby/browse_thread/thread/c2e2f3b9a6ffac50/95e9a6b7bc4ca00f
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