changing RUR to RUB in old accounts file

[Alexey]

On Wed, 2008-02-13 at 09:59 -0500, Derek Atkins wrote:

> Did you have an instance of a gnc:commodity at the top of the file
> that encoded RUR?
> 
> -derek

Not exactly on the top but it stated the following from line 67:

<gnc:commodity version="2.0.0">
  <cmdty:space>ISO4217</cmdty:space>
  <cmdty:id>RUR</cmdty:id>
  <cmdty:get_quotes/>
  <cmdty:quote_source>currency</cmdty:quote_source>
  <cmdty:quote_tz/>
</gnc:commodity>