Switch the route-reflector membership test to
= ANY(ARRAY[${rr_loopbacks:singlequote}]::text[]) — the singlequote
format is the one already proven to interpolate correctly in this
Grafana instance (rr_locrib_diff uses it), and the ARRAY[...]::text[]
wrapper stays valid (empty array) when the variable resolves empty.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>