Merge branch 'docs/add-source-code-permissions' into 'master'

Add project code view permissions

See merge request gitlab-org/gitlab-ce!24158

doc/user/permissions.md

@@ -44,6 +44,7 @@ The following table depicts the various user permission levels in a project.
 | View wiki pages                       | ✓ [^1]  | ✓          | ✓           | ✓        | ✓      |
 | View license management reports **[ULTIMATE]** | ✓ [^1]  | ✓          | ✓           | ✓        | ✓      |
 | View Security reports **[ULTIMATE]**  | ✓ [^1]  | ✓          | ✓           | ✓        | ✓      |
+| View project code                     | [^1]    | ✓          | ✓           | ✓        | ✓      |
 | Pull project code                     | [^1]    | ✓          | ✓           | ✓        | ✓      |
 | Download project                      | [^1]    | ✓          | ✓           | ✓        | ✓      |
 | Assign issues                         |         | ✓          | ✓           | ✓        | ✓      |