Metacello support for GitLab subgroups

[JanBliznicenko]

Metacello load scripts cannot handle GitLab repositories with subgroups, like https://gitlab.com/jantopgroup/middlegroup/innergroup/project

The following script does not work:

Metacello new
  baseline: 'SubgroupsProject';
  repository: 'gitlab://jantopgroup/middlegroup/innergroup/project';
  load.

It causes metacello to think that "middlegroup" is project (repository) name and "innergroup/project" to be subdirectory with code.

Using [email protected]:jantopgroup/middlegroup/innergroup/project.git in Git Repositories Browser (Iceberg) works.