M image.go → image.go

@@ -81,7 +81,7 @@ m.fillWithCircles(circleCount, m.dotSize)
 	return m
 }
 
-// encodeToPNG encodes an image to PNG and returns
+// encodedPNG encodes an image to PNG and returns
 // the result as a byte slice.
 func (m *Image) encodedPNG() []byte {
 	var buf bytes.Buffer