lib/chunky_png/image.rb in chunky_png-1.3.12 vs lib/chunky_png/image.rb in chunky_png-1.3.13

@@ -1,4 +1,6 @@
+# frozen-string-literal: true
+
 module ChunkyPNG
   # ChunkyPNG::Image is an extension of the {ChunkyPNG::Canvas} class, that
   # also includes support for metadata.
   #
   # @see ChunkyPNG::Canvas