Merge branch 'fix-closes-issues-error-500' into 'master'

Fix Error 500 when using closes_issues API with an external issue tracker

Closes #18484

See merge request !4608

1 files changed, 12 insertions, 1 deletions

diff --git a/doc/api/merge_requests.md b/doc/api/merge_requests.md
index 16b892dc3b7..2930f615fc1 100644
--- a/doc/api/merge_requests.md
+++ b/doc/api/merge_requests.md
@@ -572,7 +572,7 @@ GET /projects/:id/merge_requests/:merge_request_id/closes_issues
 curl -H "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" https://gitlab.example.com/api/v3/projects/76/merge_requests/1/closes_issues
 ```
 
-Example response:
+Example response when the GitLab issue tracker is used:
 
 ```json
 [
@@ -618,6 +618,17 @@ Example response:
 ]
 ```
 
+Example response when an external issue tracker (e.g. JIRA) is used:
+
+```json
+[
+   {
+       "id" : "PROJECT-123",
+       "title" : "Title of this issue"
+   }
+]
+```
+
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