diff --git a/app/controllers/attachments_controller.rb b/app/controllers/attachments_controller.rb
index c5f615d20..5d705844b 100644
--- a/app/controllers/attachments_controller.rb
+++ b/app/controllers/attachments_controller.rb
@@ -239,7 +239,7 @@ class AttachmentsController < ApplicationController
   def detect_content_type(attachment, is_thumb = false)
     content_type = attachment.content_type
     if content_type.blank? || content_type == "application/octet-stream"
-      content_type = 
+      content_type =
         Redmine::MimeType.of(attachment.filename).presence ||
         "application/octet-stream"
     end
diff --git a/app/controllers/previews_controller.rb b/app/controllers/previews_controller.rb
index 716d27cae..e431ab0de 100644
--- a/app/controllers/previews_controller.rb
+++ b/app/controllers/previews_controller.rb
@@ -18,7 +18,7 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 class PreviewsController < ApplicationController
-  before_action :find_project, :except => :text 
+  before_action :find_project, :except => :text
   before_action :find_attachments
 
   def issue
diff --git a/app/helpers/members_helper.rb b/app/helpers/members_helper.rb
index 369677e3c..11e843099 100644
--- a/app/helpers/members_helper.rb
+++ b/app/helpers/members_helper.rb
@@ -36,7 +36,7 @@ module MembersHelper
     s + content_tag('span', links, :class => 'pagination')
   end
 
-  # Returns inheritance information for an inherited member role 
+  # Returns inheritance information for an inherited member role
   def render_role_inheritance(member, role)
     content = member.role_inheritance(role).map do |h|
       if h.is_a?(Project)
@@ -45,7 +45,7 @@ module MembersHelper
         l(:label_inherited_from_group, :name => h.name.to_s)
       end
     end.compact.uniq
-  
+
     if content.present?
       content_tag('span', content.join(", "), :class => "info")
     end
diff --git a/app/helpers/search_helper.rb b/app/helpers/search_helper.rb
index a8eb3b3d2..5ba88a60b 100644
--- a/app/helpers/search_helper.rb
+++ b/app/helpers/search_helper.rb
@@ -63,7 +63,7 @@ module SearchHelper
                        :all_words => params[:all_words], :scope => params[:scope], t => 1)
     end
     ('<ul>'.html_safe +
-        links.map {|link| content_tag('li', link)}.join(' ').html_safe + 
+        links.map {|link| content_tag('li', link)}.join(' ').html_safe +
         '</ul>'.html_safe) unless links.empty?
   end
 end
diff --git a/app/helpers/workflows_helper.rb b/app/helpers/workflows_helper.rb
index 61381794f..c09310acd 100644
--- a/app/helpers/workflows_helper.rb
+++ b/app/helpers/workflows_helper.rb
@@ -21,7 +21,7 @@ module WorkflowsHelper
   def options_for_workflow_select(name, objects, selected, options={})
     option_tags = ''.html_safe
     multiple = false
-    if selected 
+    if selected
       if selected.size == objects.size
         selected = 'all'
       else
@@ -51,7 +51,7 @@ module WorkflowsHelper
     options = [["", ""], [l(:label_readonly), "readonly"]]
     options << [l(:label_required), "required"] unless field_required?(field)
     html_options = {}
-    
+
     if perm = permissions[status.id][name]
       if perm.uniq.size > 1 || perm.size < @roles.size * @trackers.size
         options << [l(:label_no_change_option), "no_change"]
@@ -76,7 +76,7 @@ module WorkflowsHelper
 
   def transition_tag(workflows, old_status, new_status, name)
     w = workflows.select {|w| w.old_status == old_status && w.new_status == new_status}.size
-    
+
     tag_name = "transitions[#{ old_status.try(:id) || 0 }][#{new_status.id}][#{name}]"
     if old_status == new_status
       check_box_tag(tag_name, "1", true,
diff --git a/app/models/mail_handler.rb b/app/models/mail_handler.rb
index 82cbc0790..44aed826f 100755
--- a/app/models/mail_handler.rb
+++ b/app/models/mail_handler.rb
@@ -459,7 +459,7 @@ class MailHandler < ActionMailer::Base
     end
   end
 
-  # Returns the text content of the email. 
+  # Returns the text content of the email.
   # If the value of Setting.mail_handler_preferred_body_part is 'html',
   # it returns text converted from the text/html part of the email.
   # Otherwise, it returns text/plain part.