[skip ci] changelog and minor style changes added

app/services/merge_requests/create_from_issue_service.rb

@@ -3,7 +3,7 @@ module MergeRequests
     def execute
       return error('Invalid issue iid') unless issue_iid.present? && issue.present?
 
-      params[:label_ids] =  issue.label_ids if issue.label_ids.any?
+      params[:label_ids] = issue.label_ids if issue.label_ids.any?
       
       result = CreateBranchService.new(project, current_user).execute(branch_name, ref)
       return result if result[:status] == :error

changelogs/unreleased/35343-inherit-milestones-and-labels.yml

+---
+title: inherits milestone and labels when a merge request is created from issue
+merge_request: 13461 
+author: haseebeqx
+type: added

spec/services/merge_requests/create_from_issue_service_spec.rb

@@ -2,10 +2,10 @@ require 'spec_helper'
 
 describe MergeRequests::CreateFromIssueService do
   let(:project) { create(:project, :repository) }
-  let(:user)    { create(:user) }
+  let(:user) { create(:user) }
   let(:label_ids) { create_pair(:label, project: project).map(&:id) }
   let(:milestone_id) { create(:milestone, project: project).id }
-  let(:issue)   { create(:issue, project: project, milestone_id: milestone_id) }
+  let(:issue) { create(:issue, project: project, milestone_id: milestone_id) }
 
   subject(:service) { described_class.new(project, user, issue_iid: issue.iid) }