R help - Mar 2014 - going backward in code

Hi,
     when typing code I get like this
 x <-(1,2,
+
+
+


Can I delete + and comma after 2 and go back to end of comma as x <-c(1,2)


Thanks.
Prabhakar

-- 
Dr.Ghorpade Prabhakar B.
Ph.D. Scholar ( Animal Biochemistry)
Indian Veterinary Research Institute.
India

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