Strip whitespace from assign quick action params

app/services/quick_actions/interpret_service.rb

@@ -643,7 +643,7 @@ module QuickActions
       if users.empty?
         users =
-          if params == 'me'
+          if params.strip == 'me'
             [current_user]
           else
             User.where(username: params.split(' ').map(&:strip))

changelogs/unreleased/52772-assign-me-quick-action-doesn-t-work-if-there-is-extra-white-space.yml

+---
+title: Resolve assign-me quick action doesn't work if there is extra white space
+merge_request: 22402
+author:
+type: fixed

spec/services/quick_actions/interpret_service_spec.rb

@@ -538,6 +538,26 @@ describe QuickActions::InterpretService do
       end
     end
+    context 'assign command with me alias and whitespace' do
+      let(:content) { "/assign  me " }
+
+      context 'Issue' do
+        it 'fetches assignee and populates assignee_ids if content contains /assign' do
+          _, updates = service.execute(content, issue)
+
+          expect(updates).to eq(assignee_ids: [developer.id])
+        end
+      end
+
+      context 'Merge Request' do
+        it 'fetches assignee and populates assignee_ids if content contains /assign' do
+          _, updates = service.execute(content, merge_request)
+
+          expect(updates).to eq(assignee_ids: [developer.id])
+        end
+      end
+    end
+
     it_behaves_like 'empty command' do
       let(:content) { '/assign @abcd1234' }
       let(:issuable) { issue }