Add missing empty line at the end of file

doc/user/project/milestones/index.md

@@ -8,8 +8,8 @@ Milestones allow you to organize issues and merge requests into a cohesive group
 
 ## Project milestones and group milestones
 
-- **Project milestones** can be assigned to issues or merge requests in that project only. 
-- **Group milestones** can be assigned to any issue or merge request of any project in that group. 
+- **Project milestones** can be assigned to issues or merge requests in that project only.
+- **Group milestones** can be assigned to any issue or merge request of any project in that group.
 - In the [future](https://gitlab.com/gitlab-org/gitlab-ce/issues/36862), you will be able to assign group milestones to issues and merge reqeusts of projects in [subgroups](../../group/subgroups/index.md).
 
 ## Creating milestones
@@ -108,4 +108,4 @@ The milestone sidebar on the milestone view shows the following:
 
 For project milestones only, the milestone sidebar shows the total issue weight of all issues that have the milestone assigned.
 
-![Project milestone page](img/milestones_project_milestone_page.png)
+![Project milestone page](img/milestones_project_milestone_page.png)
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