Rubocop auto correct

lib/uplot/command.rb

@@ -1,5 +1,6 @@
 require 'optparse'
 require_relative 'preprocessing'
+require_relative 'command/params'
 
 module Uplot
   Data = Struct.new(:headers, :series)

lib/uplot/plot.rb

@@ -128,7 +128,7 @@ module Uplot
         print v
         print k
         print "\t"
-          print "  ●"
+        print '  ●'
         print "\033[0m"
         print "\t"
       end