Starting with the release of Strategy ONE (March 2024), dossiers are also known as dashboards.
In Strategy Web 10.x, users can edit the title of individual visualizations in a Visual Insight dashboard or Dossier to better label different visualizations. However, when trying to add a title with extra spaces or tabs, these extra spaces are not retained when saving the title. The below screenshot shows the title of the visualization before saving.

The below screenshot shows the title with the extra spaces removed after saving the title.

This is an identified defect in Strategy Web 10.x.
The issue was addressed in Strategy 2019 (and above). Please consider updating to take advantage of the fix.