Add blank line, update error message

Editor assessment

This style commit gets scope right: (microservices) correctly narrows the area, and the imperative, period-free header is well formed. The flaw is the pairing: "add blank line" is a formatting no-op while "update error message" alters user-facing text, and bundling them forces both under style, blurring what the commit really does. Splitting into two commits would let each carry an honest type. Worse, wording changes are exactly where a one-line body shines — what did the error say before, and why did it need updating? None of that why is present. As a structural specimen it is fine; as a communication example it is thin.