palette.rb in chunky_png-1.3.13

- old
+ new

@@ -1,4 +1,6 @@
+# frozen-string-literal: true
+
 module ChunkyPNG
   # A palette describes the set of colors that is being used for an image.
   #
   # A PNG image can contain an explicit palette which defines the colors of
   # that image, but can also use an implicit palette, e.g. all truecolor colors