Fixed some comments in math.go.

math.go

@@ -62,22 +62,22 @@ func Round32(f float32) float32 {
 	return float32(math.Round(float64(f)))
 }
 
-// Sq the square root of the value
+// Sq returns the squared value of f.
 func Sq(f float64) float64 {
 	return f * f
 }
 
-// Sq32 the square root of the value
+// Sq32 returns the squared value of f.
 func Sq32(f float32) float32 {
 	return f * f
 }
 
-// Sqrt the square root of the value
+// Sqrt the square root of the value.
 func Sqrt(f float64) float64 {
 	return math.Sqrt(f)
 }
 
-// Sqrt32 the square root of the value
+// Sqrt32 the square root of the value.
 func Sqrt32(f float32) float32 {
 	return float32(Sqrt(float64(f)))
 }