Adds Rubocop rule for line break after guard clause

Adds a rubocop rule (with autocorrect) to ensure line break after guard clauses.

app/controllers/application_controller.rb

@@ -97,6 +97,7 @@ class ApplicationController < ActionController::Base
   # (e.g. tokens) to authenticate the user, whereas Devise sets current_user
   def auth_user
     return current_user if current_user.present?
+
     return try(:authenticated_user)
   end

app/controllers/autocomplete_controller.rb

@@ -44,6 +44,7 @@ class AutocompleteController < ApplicationController
       if @project.blank? && params[:group_id].present?
         group = Group.find(params[:group_id])
         return render_404 unless can?(current_user, :read_group, group)
+
         group
       end
     end
@@ -54,6 +55,7 @@ class AutocompleteController < ApplicationController
       if params[:project_id].present?
         project = Project.find(params[:project_id])
         return render_404 unless can?(current_user, :read_project, project)
+
         project
       end
     end

app/controllers/import/gitlab_projects_controller.rb

@@ -4,6 +4,7 @@ class Import::GitlabProjectsController < Import::BaseController
   def new
     @namespace = Namespace.find(project_params[:namespace_id])
     return render_404 unless current_user.can?(:create_projects, @namespace)
+
     @path = project_params[:path]
   end

app/controllers/projects/deployments_controller.rb

@@ -12,6 +12,7 @@ class Projects::DeploymentsController < Projects::ApplicationController
   def metrics
     return render_404 unless deployment.has_metrics?
+
     @metrics = deployment.metrics
     if @metrics&.any?
       render json: @metrics, status: :ok

app/controllers/projects/group_links_controller.rb

@@ -12,6 +12,7 @@ class Projects::GroupLinksController < Projects::ApplicationController
     if group
       return render_404 unless can?(current_user, :read_group, group)
+
       Projects::GroupLinks::CreateService.new(project, current_user, group_link_create_params).execute(group)
     else
       flash[:alert] = 'Please select a group.'

app/controllers/projects/issues_controller.rb

@@ -171,6 +171,7 @@ class Projects::IssuesController < Projects::ApplicationController
   def issue
     return @issue if defined?(@issue)
+
     # The Sortable default scope causes performance issues when used with find_by
     @issuable = @noteable = @issue ||= @project.issues.where(iid: params[:id]).reorder(nil).take!
     @note = @project.notes.new(noteable: @issuable)

app/controllers/projects/labels_controller.rb

@@ -111,6 +111,7 @@ class Projects::LabelsController < Projects::ApplicationController
     begin
       return render_404 unless promote_service.execute(@label)
+
       respond_to do |format|
         format.html do
           redirect_to(project_labels_path(@project),

app/controllers/projects/lfs_storage_controller.rb

@@ -54,6 +54,7 @@ class Projects::LfsStorageController < Projects::GitHttpClientController
     name = request.headers['X-Gitlab-Lfs-Tmp']
     return if name.include?('/')
     return unless oid.present? && name.start_with?(oid)
+
     name
   end

app/controllers/projects/notes_controller.rb

@@ -76,6 +76,7 @@ class Projects::NotesController < Projects::ApplicationController
   def authorize_create_note!
     return unless noteable.lockable?
+
     access_denied! unless can?(current_user, :create_note, noteable)
   end
 end

app/controllers/projects/wikis_controller.rb

@@ -28,6 +28,7 @@ class Projects::WikisController < Projects::ApplicationController
       )
     else
       return render('empty') unless can?(current_user, :create_wiki, @project)
+
       @page = WikiPage.new(@project_wiki)
       @page.title = params[:id]

app/controllers/projects_controller.rb

@@ -269,6 +269,7 @@ class ProjectsController < Projects::ApplicationController
   def render_landing_page
     if can?(current_user, :download_code, @project)
       return render 'projects/no_repo' unless @project.repository_exists?
+
       render 'projects/empty' if @project.empty_repo?
     else
       if @project.wiki_enabled?

app/finders/personal_access_tokens_finder.rb

@@ -18,6 +18,7 @@ class PersonalAccessTokensFinder
   def by_user(tokens)
     return tokens unless @params[:user]
+
     tokens.where(user: @params[:user])
   end

app/helpers/diff_helper.rb

@@ -111,6 +111,7 @@ module DiffHelper
   def diff_file_old_blob_raw_path(diff_file)
     sha = diff_file.old_content_sha
     return unless sha
+
     project_raw_path(@project, tree_join(diff_file.old_content_sha, diff_file.old_path))
   end

app/helpers/emails_helper.rb

@@ -24,6 +24,7 @@ module EmailsHelper
   def action_title(url)
     return unless url
+
     %w(merge_requests issues commit).each do |action|
       if url.split("/").include?(action)
         return "View #{action.humanize.singularize}"

app/helpers/markup_helper.rb

@@ -53,6 +53,7 @@ module MarkupHelper
       # text, wrapping anything found in the requested link
       fragment.children.each do |node|
         next unless node.text?
+
         node.replace(link_to(node.text, url, html_options))
       end
     end

app/helpers/notifications_helper.rb

@@ -78,6 +78,7 @@ module NotificationsHelper
   # Create hidden field to send notification setting source to controller
   def hidden_setting_source_input(notification_setting)
     return unless notification_setting.source_type
+
     hidden_field_tag "#{notification_setting.source_type.downcase}_id", notification_setting.source_id
   end

app/helpers/tree_helper.rb

@@ -88,6 +88,7 @@ module TreeHelper
         part_path = part if part_path.empty?
         next if parts.count > max_links && !parts.last(2).include?(part)
+
         yield(part, part_path)
       end
     end

app/helpers/visibility_level_helper.rb

@@ -150,6 +150,7 @@ module VisibilityLevelHelper
   def restricted_visibility_levels(show_all = false)
     return [] if current_user.admin? && !show_all
+
     current_application_settings.restricted_visibility_levels || []
   end
@@ -159,6 +160,7 @@ module VisibilityLevelHelper
   def disallowed_visibility_level?(form_model, level)
     return false unless form_model.respond_to?(:visibility_level_allowed?)
+
     !form_model.visibility_level_allowed?(level)
   end

app/models/ci/build.rb

@@ -317,6 +317,7 @@ module Ci
     def execute_hooks
       return unless project
+
       build_data = Gitlab::DataBuilder::Build.build(self)
       project.execute_hooks(build_data.dup, :job_hooks)
       project.execute_services(build_data.dup, :job_hooks)

app/models/ci/pipeline.rb

@@ -300,8 +300,10 @@ module Ci
     def latest?
       return false unless ref
+
       commit = project.commit(ref)
       return false unless commit
+
       commit.sha == sha
     end