Description of problem:
Switcher text should be just “YAML”. No need for the :On/ :Off.
The text should not be bold but regular.

ux doc: https://docs.google.com/document/d/1E1e-dI8mR-AizpX0-m8GCqX2O0E8wRvXVjWXSKvAf9g/edit#

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