Fix unterminated comment in bidder.go and format.

auctionsim/bidder.go

@@ -57,8 +57,9 @@ type Bidder struct {
 /**
  * ValueBelief returns how much the bidder *thinks* the item is worth to them.
  * The actual value to them is b.Value.
+ */
 func (b Bidder) ValueBelief() float64 {
-	return b.Value + b.Irrationality;
+	return b.Value + b.Irrationality
 }
 
 /**