Add documentation for the "Only allow merge requests to be merged if all…

doc/user/project/merge_requests/merge_request_discussion_resolution.md

@@ -33,7 +33,25 @@ resolved discussions tracker.
 
 !["3/4 discussions resolved"][discussions-resolved]
 
+## Only allow merge requests to be merged if all discussions are resolved
+
+> [Introduced][ce-7125] in GitLab 8.14.
+
+You can prevent merge requests from being merged until all discussions are resolved.
+
+Navigate to your project's settings page, select the
+**Only allow merge requests to be merged if all discussions are resolved** check
+box and hit **Save** for the changes to take effect.
+
+![Only allow merge if all the discussions are resolved settings](img/only_allow_merge_if_all_discussions_are_resolved.png)
+
+From now on, you will not be able to merge from the UI until all discussions
+are resolved.
+
+![Only allow merge if all the discussions are resolved message](img/only_allow_merge_if_all_discussions_are_resolved_msg.png)
+
 [ce-5022]: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/5022
+[ce-7125]: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/7125
 [resolve-discussion-button]: img/resolve_discussion_button.png
 [resolve-comment-button]: img/resolve_comment_button.png
 [discussion-view]: img/discussion_view.png

doc/user/project/merge_requests/merge_when_build_succeeds.md

@@ -40,7 +40,7 @@ hit **Save** for the changes to take effect.
 
 ![Only allow merge if build succeeds settings](img/merge_when_build_succeeds_only_if_succeeds_settings.png)
 
-From now on, every time the pipelinefails you will not be able to merge the
+From now on, every time the pipeline fails you will not be able to merge the
 merge request from the UI, until you make all relevant builds pass.
 
-![Only allow merge if build succeeds msg](img/merge_when_build_succeeds_only_if_succeeds_msg.png)
+![Only allow merge if build succeeds message](img/merge_when_build_succeeds_only_if_succeeds_msg.png)