Today is the Medford-Brooks Estate Land Trust's annual Spring Spruce-up, taking place in conjunction with the citywide cleanup. Key areas to spruce up around the city's historic property are along the Grove Street Wall; along the boardwalk, near Brooks pond; and along the trails. M-BELT will provide some supplies (including rakes, trimmers, trash bags, and gloves), but volunteers are asked to bring yard tools if they have them. Lunch will be provided. M-BELT is a nonprofit organization that manages the…