bin/code in code-ruby-0.6.3 vs bin/code in code-ruby-0.6.4

@@ -1,17 +1,18 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
 require "optparse"
 require_relative "../lib/code-ruby"
 
 options = { timeout: 0, profile: false, profiler: "text" }
 
 OptionParser
   .new do |opts|
     opts.banner = "Usage: template [options]"
 
-    opts.on("-v", "--version", "Version of template") do |input|
+    opts.on("-v", "--version", "Version of template") do |_input|
       puts Code::Version
       exit
     end
 
     opts.on(
@@ -42,10 +43,10 @@
       "-t TIMEOUT",
       "--timeout=TIMEOUT",
       "Set timeout in seconds"
     ) { |timeout| options[:timeout] = timeout.to_f }
 
-    opts.on("--profile", "Profile Ruby code") do |timeout|
+    opts.on("--profile", "Profile Ruby code") do |_timeout|
       require "ruby-prof"
       options[:profile] = true
     end
 
     opts.on(