Fix linter

Author: davide-almeida

src/ruby/min_max_dc.rb

@@ -1,4 +1,6 @@
-require 'test/unit/assertions'
+# frozen_string_literal: true
+
+require "test/unit/assertions"
 include Test::Unit::Assertions
 
 def min_max_dc(vector, start_index, end_index)
@@ -19,4 +21,4 @@ def min_max_dc(vector, start_index, end_index)
 assert_equal([1, 5], min_max_dc([1, 2, 3, 4, 5], 0, 4))
 assert_equal([14, 55], min_max_dc([13, 55, 42, 14, 15], 1, 3))
 assert_equal([13, 13], min_max_dc([13, 55, 42, 14, 15], 0, 0))
-assert_equal([14, 15], min_max_dc([13, 55, 42, 14, 15], 3, 4))
+assert_equal([14, 15], min_max_dc([13, 55, 42, 14, 15], 3, 4))