Group Labels with Spaces

[ssimo3lsuhsc]

Hello!
I'm trying to get a group label with a space: "Early Childhood." I'm intrigued that your example of a translated label contains a space, but neither of the following combinations work for me:

With langcode as root:

---
Name: myproject
---
SilverStripe\Core\Manifest\ModuleManifest:
  project: app
SilverStripe\Admin\LeftAndMain:
  menu_groups:
    Front:
      children:
        - SilverStripe-CMS-Controllers-CMSPagesController
        - SilverStripe-AssetAdmin-Controller-AssetAdmin
    Early_Childhood:
      children:
        - HDC-EarlyChildhood-EarlyHeadStartAdmin
langcode:
  GroupedCmsMenuLabel:
    Early_Childhood: 'Early Childhood'

With langcode nested under SilverStripe\Admin\LeftAndMain:

---
Name: myproject
---
SilverStripe\Core\Manifest\ModuleManifest:
  project: app
SilverStripe\Admin\LeftAndMain:
  menu_groups:
    Front:
      children:
        - SilverStripe-CMS-Controllers-CMSPagesController
        - SilverStripe-AssetAdmin-Controller-AssetAdmin
    Early_Childhood:
      children:
        - HDC-EarlyChildhood-EarlyHeadStartAdmin
  langcode:
    GroupedCmsMenuLabel:
      Early_Childhood: 'Early Childhood'