Fix code style

Author: mrkn

lib/unicode_plot/block_canvas.rb

@@ -1,16 +1,13 @@
 # coding: utf-8
 
-=begin
-The `BlockCanvas` is also Unicode-based.
-It has half the resolution of the `BrailleCanvas`.
-In contrast to BrailleCanvas, the pixels don't
-have visible spacing between them.
-This canvas effectively turns every character
-into 4 pixels that can individually be manipulated
-using binary operations.
-=end
-
 module UnicodePlot
+  # The `BlockCanvas` is also Unicode-based.
+  # It has half the resolution of the `BrailleCanvas`.
+  # In contrast to BrailleCanvas, the pixels don't
+  # have visible spacing between them.
+  # This canvas effectively turns every character
+  # into 4 pixels that can individually be manipulated
+  # using binary operations.
   class BlockCanvas < LookupCanvas
     X_PIXEL_PER_CHAR = 2
     Y_PIXEL_PER_CHAR = 2
@@ -23,14 +20,17 @@ def initialize(width, height, fill_char=0, **kw)
             **kw)
     end
 
-    BLOCK_SIGNS = [ [0b1000, 0b0010].freeze,
-                    [0b0100, 0b0001].freeze
-                  ].freeze
+    BLOCK_SIGNS = [
+      [0b1000, 0b0010].freeze,
+      [0b0100, 0b0001].freeze
+    ].freeze
 
-    BLOCK_DECODE = [' ', '▗', '▖', '▄',
-                    '▝', '▐', '▞', '▟',
-                    '▘', '▚', '▌', '▙',
-                    '▀', '▜', '▛', '█' ].freeze
+    BLOCK_DECODE = [
+      ' ', '▗', '▖', '▄',
+      '▝', '▐', '▞', '▟',
+      '▘', '▚', '▌', '▙',
+      '▀', '▜', '▛', '█'
+    ].freeze
 
     def lookup_encode(x,y) ; BLOCK_SIGNS[x][y] ; end
     def lookup_decode(x) ; BLOCK_DECODE[x] ; end