Error in bind example in SPARQL 1.1 recommendation

[Daniel Hernández]

Hello,

In examples in section 18.2.3 "Examples of Mapped Graph Patterns" [1]
appears the code:

   { ?s :p ?v . {} BIND (2*?v AS ?v2) } 

   Join(
       BGP(?s :p ?v), ?v2, 2*?v) , 
       Extend({}, ?v2, 2*?v) 
   )

In the line "BGP(?s :p ?v), ?v2, 2*?v)" there is a not matching
parenthesis.

Regards,
Daniel

[1]: http://www.w3.org/TR/sparql11-query/#sparqlAlgebraExamples