Run rubocop --fix-layout and remove encoding comments

db/migrate/006_create_articles.rb

@@ -1,5 +1,5 @@
 class CreateArticles < ActiveRecord::Migration[4.2]
-  SAMPLE_ARTICLE_NAMES =  ['banana', 'kiwi', 'strawberry']
+  SAMPLE_ARTICLE_NAMES = ['banana', 'kiwi', 'strawberry']
 
   def self.up
     create_table :articles do |t|
@@ -11,23 +11,23 @@ class CreateArticles < ActiveRecord::Migration[4.2]
       t.column :availability, :boolean, :default => true, :null => false
       t.column :current_price_id, :integer
     end
-    add_index(:articles, :name, :unique => true)  
-  
+    add_index(:articles, :name, :unique => true)
+
     # Create 30 sample articles...
     puts "Create 3 articles of the supplier '#{CreateSuppliers::SUPPLIER_SAMPLE}'..."
     raise "Supplier '#{CreateSuppliers::SUPPLIER_SAMPLE}' not found!" unless supplier = Supplier.find_by_name(CreateSuppliers::SUPPLIER_SAMPLE)
     raise "Category '#{CreateArticleMeta::CATEGORY_SAMPLE}' not found!" unless category = ArticleCategory.find_by_name(CreateArticleMeta::CATEGORY_SAMPLE)
+
     SAMPLE_ARTICLE_NAMES.each do |a|
-      puts 'Create Article ' + a 
-      Article.create( :name => a, 
-                      :supplier => supplier,
-                      :article_category => category,
-                      :unit => '500g',
-                      :note => 'delicious',
-                      :availability => true)
-    end   
+      puts 'Create Article ' + a
+      Article.create(:name => a,
+                     :supplier => supplier,
+                     :article_category => category,
+                     :unit => '500g',
+                     :note => 'delicious',
+                     :availability => true)
+    end
     raise "Failed!" unless Article.find(:all).length == SAMPLE_ARTICLE_NAMES.length
-    
   end
 
   def self.down