Reset master to testing content

internal/braille/unavailable.go

@@ -0,0 +1,12 @@
+//go:build !brlapi || !cgo
+
+package braille
+
+type unavailable struct{}
+
+func New() Backend                          { return unavailable{} }
+func NewRouting() Backend                   { return unavailable{} }
+func (unavailable) Open() (Geometry, error) { return Geometry{}, ErrUnavailable }
+func (unavailable) Write(string, int) error { return ErrUnavailable }
+func (unavailable) ReadKey() (Key, error)   { return NoKey, ErrUnavailable }
+func (unavailable) Close() error            { return nil }