Haml clean up for Roles views

app/views/roles/_form.html.haml

@@ -1,7 +1,9 @@
 = form_for @role do |f|
   - if @role.errors.any?
     #error_explanation
-      %h2= "#{pluralize(@role.errors.size, "error")} prohibited this role from being saved:"
+      %h2
+        = pluralize(@role.errors.size, "error")
+        prohibited this role from being saved:
       %ul
         - @role.errors.full_messages.each do |msg|
           %li= msg

app/views/roles/index.html.haml

@@ -1,7 +1,7 @@
 - content_for :title, "Listing roles"
 
 - if can? :create, Role
-  %p= link_to 'New Role', new_role_path, :class => 'btn btn-primary'
+  %p= link_to 'New Role', new_role_path, class: 'btn btn-primary'
 
 %table
   %tr
@@ -16,6 +16,7 @@
       %td= link_to role.name, role
       %td= role.description
       - if can? :edit, role
-        %td= link_to 'Edit', edit_role_path(role), :class => 'btn btn-default btn-xs'
+        %td= link_to 'Edit', edit_role_path(role), class: 'btn btn-default btn-xs'
       - if can? :destroy, role
-        %td= link_to 'Delete', role, method: :delete, data: { confirm: 'Are you sure?' }, :class => 'btn btn-default btn-xs'
+        %td= link_to 'Delete', role, method: :delete,
+            data: { confirm: 'Are you sure?' }, class: 'btn btn-default btn-xs'

app/views/roles/show.html.haml

@@ -7,6 +7,6 @@
   %b Description:
   = @role.description
 
-= link_to 'Edit', edit_role_path(@role), :class => 'btn btn-default btn-xs'
+= link_to 'Edit', edit_role_path(@role), class: 'btn btn-default btn-xs'
 \|
 = link_to 'Back', roles_path