Update copy for error message (#2583)

config/locales/en.yml

@@ -175,7 +175,7 @@ en:
         merge_request:
           attributes:
             absorbing_organisation_id:
-              blank: "Select the organisation absorbing the others"
+              blank: "Select the absorbing organisation"
             merge_date: 
               blank: "Enter a merge date"
               invalid: "Enter a valid merge date"

spec/requests/merge_requests_controller_spec.rb

@@ -246,7 +246,7 @@ RSpec.describe MergeRequestsController, type: :request do
           it "renders the error" do
             request
 
-            expect(page).to have_content("Select the organisation absorbing the others")
+            expect(page).to have_content("Select the absorbing organisation")
           end
 
           it "does not update the request" do