remove semis after statements in one-statement statement lists

R=rsc, r
http://go/go-review/1025029
diff --git a/src/pkg/math/asin.go b/src/pkg/math/asin.go
index 38fc365..c4696e8 100644
--- a/src/pkg/math/asin.go
+++ b/src/pkg/math/asin.go
@@ -20,18 +20,18 @@
 		sign = true;
 	}
 	if x > 1 {
-		return NaN();
+		return NaN()
 	}
 
 	temp := Sqrt(1 - x*x);
 	if x > 0.7 {
-		temp = Pi/2 - Atan(temp/x);
+		temp = Pi/2 - Atan(temp/x)
 	} else {
-		temp = Atan(x/temp);
+		temp = Atan(x/temp)
 	}
 
 	if sign {
-		temp = -temp;
+		temp = -temp
 	}
 	return temp;
 }
@@ -39,7 +39,7 @@
 // Acos returns the arc cosine of x.
 func Acos(x float64) float64 {
 	if x > 1 || x < -1 {
-		return NaN();
+		return NaN()
 	}
 	return Pi/2 - Asin(x);
 }