Fix bad rubocop auto-correct affecting procs

Switch to stabby lambdas, where consistent.

Signed-off-by: Alex Coles <alex@alexbcoles.com>

app/models/changeset.rb

@@ -39,7 +39,7 @@ class Changeset < ActiveRecord::Base
                 description: :long_comments,
                 datetime: :committed_on,
                 url: Proc.new { |o| { controller: '/repositories', action: 'revision', id: o.repository.project, rev: o.identifier } },
-                author: Proc.new(&:author)
+                author: Proc.new { |o| o.author }
 
   acts_as_searchable columns: 'comments',
                      include: { repository: :project },

app/models/project.rb

@@ -106,7 +106,8 @@ class Project < ActiveRecord::Base
   validates_length_of :homepage, maximum: 255
   validates_length_of :identifier, in: 1..IDENTIFIER_MAX_LENGTH
   # downcase letters, digits, dashes but not digits only
-  validates_format_of :identifier, with: /\A(?!\d+$)[a-z0-9\-_]*\z/, if: Proc.new(&:identifier_changed?)
+  validates_format_of :identifier, with: /\A(?!\d+$)[a-z0-9\-_]*\z/,
+                                   if: -> (p) { p.identifier_changed? }
   # reserved words
   validates_exclusion_of :identifier, in: RESERVED_IDENTIFIERS
 

lib/plugins/acts_as_customizable/lib/acts_as_customizable.rb

@@ -44,7 +44,8 @@ module Redmine
                                    dependent: :delete_all
           before_validation { |customized| customized.custom_field_values if customized.new_record? }
           # Trigger validation only if custom values were changed
-          validates_associated :custom_values, on: :update, if: Proc.new(&:custom_field_values_changed?)
+          validates_associated :custom_values, on: :update,
+                               if: -> (customized) { customized.custom_field_values_changed? }
           send :include, Redmine::Acts::Customizable::InstanceMethods
           # Save custom values when saving the customized object
           after_save :save_custom_field_values