Fix typo in gob docs. They were introduced in revision 3199778baf "change the encoding of uints...".
Fix typo in gob docs. They were introduced in revision 3199778baf
"change the encoding of uints...".

R=r
CC=golang-dev
http://codereview.appspot.com/1436041

tav/go,tav/go,tav/go,tav/go,tav/go,tav/go,tav/go