Create struct for colorized comment

src/spectator/formatters/comment.cr

@@ -0,0 +1,20 @@
+module Spectator::Formatters
+  # Produces a stringified comment for output.
+  private struct Comment(T)
+    # Creates the comment.
+    def initialize(@text : T)
+    end
+
+    # Appends the comment to the output.
+    def to_s(io)
+      io << '#'
+      io << ' '
+      io << @text
+    end
+
+    # Creates a colorized version of the comment.
+    def self.color(text : T) forall T
+      Color.comment(new(text))
+    end
+  end
+end

src/spectator/formatters/failure_block.cr

@@ -77,9 +77,7 @@ module Spectator::Formatters
     private def source(io)
       INITIAL_INDENT.times { io << ' ' }
       (@index_length + 2).times { io << ' ' } # +2 for ) and space.
-      io << '#'
-      io << ' '
-      io << Color.comment(@result.example.source)
+      io << Comment.color(@result.example.source)
     end
 
     # Gets the number of characters a positive integer spans in base 10.

src/spectator/formatters/suite_summary.cr

@@ -47,7 +47,8 @@ module Spectator::Formatters
       failures.each do |result|
         @io.print "crystal spec "
         result.example.source.to_s(@io)
-        @io.puts " # TODO"
+        @io << ' '
+        @io.puts Comment.color("TODO")
       end
     end