vinyl: vy_stmt_snprint: prettify output a bit
vinyl: vy_stmt_snprint: prettify output a bit

Surround key and lsn in parentheses.

mejedi/tarantool,rtsisyk/tarantool,rtsisyk/tarantool,mejedi/tarantool,mejedi/tarantool,rtsisyk/tarantool,mejedi/tarantool,rtsisyk/tarantool