diff --git a/lib/uplot/command.rb b/lib/uplot/command.rb
index 292bde0..2571b89 100644
--- a/lib/uplot/command.rb
+++ b/lib/uplot/command.rb
@@ -1,5 +1,6 @@
 require 'optparse'
 require_relative 'preprocessing'
+require_relative 'command/params'
 
 module Uplot
   Data = Struct.new(:headers, :series)
@@ -225,7 +226,7 @@ module Uplot
 
     def run
       parse_options
-      
+
       if command == :colors
         Plot.colors
         exit
diff --git a/lib/uplot/plot.rb b/lib/uplot/plot.rb
index 79ebed0..258a352 100644
--- a/lib/uplot/plot.rb
+++ b/lib/uplot/plot.rb
@@ -124,15 +124,15 @@ module Uplot
     end
 
     def colors
-        UnicodePlot::StyledPrinter::TEXT_COLORS.each do |k,v|
-          print v
-          print k
-          print "\t"
-          print "  ●"
-          print "\033[0m"
-          print "\t"
-        end
-        puts
+      UnicodePlot::StyledPrinter::TEXT_COLORS.each do |k, v|
+        print v
+        print k
+        print "\t"
+        print '  ●'
+        print "\033[0m"
+        print "\t"
+      end
+      puts
     end
 
     def check_series_size(data, fmt)
diff --git a/test/uplot/preprocessing_test.rb b/test/uplot/preprocessing_test.rb
index f3be617..d20cfce 100644
--- a/test/uplot/preprocessing_test.rb
+++ b/test/uplot/preprocessing_test.rb
@@ -61,7 +61,7 @@ class UplotPreprocessingTest < Test::Unit::TestCase
 
   test :get_series do
     n = nil
-    
+
     assert_equal([[2, 3], [5, 6], [8, 9]], @m.get_series([[1, 2, 3],
                                                           [4, 5, 6],
                                                           [7, 8, 9]], true, true))