Corrected with rubocop cop 'Style/SymbolProc'.

.rubocop.yml

@@ -182,10 +182,6 @@ Rails/ActionFilter:
   Description: 'Enforces consistent use of action filter methods.'
   Enabled: false
 
-Style/SymbolProc:
-  Description: 'Use symbols as procs instead of blocks when possible.'
-  Enabled: false
-
 Style/SignalException:
   Description: 'Checks for proper usage of fail and raise.'
   StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#fail-method'

app/models/link.rb

@@ -130,9 +130,7 @@ class Link < ApplicationModel
       link_object_target_id: data[:link_object_target_id],
       link_object_target_value: data[:link_object_target_value]
     )
-    links.each { |link|
-      link.destroy
-    }
+    links.each(&:destroy)
 
     # from the other site
     if data.key?(:link_type)
@@ -146,9 +144,7 @@ class Link < ApplicationModel
       link_object_source_id: data[:link_object_target_id],
       link_object_source_value: data[:link_object_target_value]
     )
-    links.each { |link|
-      link.destroy
-    }
+    links.each(&:destroy)
   end
 
   def self.link_type_get(data)

app/models/observer/organization/ref_object_touch.rb

@@ -19,9 +19,7 @@ class Observer::Organization::RefObjectTouch < ActiveRecord::Observer
     return if Setting.get('import_mode')
 
     # touch organizations tickets
-    Ticket.select('id').where( organization_id: record.id ).each {|ticket|
-      ticket.touch
-    }
+    Ticket.select('id').where( organization_id: record.id ).each(&:touch)
 
     # touch current members
     record.member_ids.uniq.each {|user_id|

app/models/tag.rb

@@ -43,9 +43,7 @@ class Tag < ApplicationModel
       tag_item_id: tag_item_id,
       o_id: data[:o_id],
     )
-    result.each { |item|
-      item.destroy
-    }
+    result.each(&:destroy)
     true
   end
 

app/models/ticket.rb

@@ -128,9 +128,7 @@ returns
   def merge_to(data)
 
     # update articles
-    Ticket::Article.where( ticket_id: self.id ).each {|article|
-      article.touch
-    }
+    Ticket::Article.where( ticket_id: self.id ).each(&:touch)
 
     # quiet update of reassign of articles
     Ticket::Article.where( ticket_id: self.id ).update_all( ['ticket_id = ?', data[:ticket_id] ] )

app/models/ticket/escalation.rb

@@ -18,9 +18,7 @@ returns
     state_list_open = Ticket::State.by_category( 'open' )
 
     tickets = Ticket.where( state_id: state_list_open )
-    tickets.each {|ticket|
-      ticket.escalation_calculation
-    }
+    tickets.each(&:escalation_calculation)
   end
 
 =begin

lib/core_ext/string.rb

@@ -66,7 +66,7 @@ class String
     # see also test/fixtures/mail21.box
     # note: string.encode!('UTF-8', 'UTF-8', :invalid => :replace, :replace => '?') was not detecting invalid chars
     if !string.valid_encoding?
-      string = string.chars.select { |c| c.valid_encoding? }.join
+      string = string.chars.select(&:valid_encoding?).join
     end
 
     # find <a href=....> and replace it with [x]

lib/sessions/client.rb

@@ -52,9 +52,7 @@ class Sessions::Client
       self.log "---client - looking for data of user #{user.id}"
 
       # push messages from backends
-      backend_pool.each {|pool|
-        pool.push
-      }
+      backend_pool.each(&:push)
 
       self.log '---/client-'
 

test/integration/twitter_test.rb

@@ -30,9 +30,7 @@ class TwitterTest < ActiveSupport::TestCase
 
   # add channel
   current = Channel.where( adapter: 'Twitter2' )
-  current.each {|r|
-    r.destroy
-  }
+  current.each(&:destroy)
   Channel.create(
     adapter: 'Twitter2',
     area: 'Twitter::Inbound',