box-protocol.txt: fix a bug in splice documentation.
box-protocol.txt: fix a bug in splice documentation.

Sannis/tarantool,vasilenkomike/tarantool,dkorolev/tarantool,vasilenkomike/tarantool,dkorolev/tarantool,ocelot-inc/tarantool,nvoron23/tarantool,ocelot-inc/tarantool,nvoron23/tarantool,KlonD90/tarantool,condor-the-bird/tarantool,dkorolev/tarantool,condor-the-bird/tarantool,condor-the-bird/tarantool,vasilenkomike/tarantool,dkorolev/tarantool,KlonD90/tarantool,ocelot-inc/tarantool,rtsisyk/tarantool,dkorolev/tarantool,condor-the-bird/tarantool,condor-the-bird/tarantool,Sannis/tarantool,KlonD90/tarantool,nvoron23/tarantool,guard163/tarantool,guard163/tarantool,rtsisyk/tarantool,nvoron23/tarantool,nvoron23/tarantool,ocelot-inc/tarantool,mejedi/tarantool,Sannis/tarantool,KlonD90/tarantool,mejedi/tarantool,KlonD90/tarantool,guard163/tarantool,rtsisyk/tarantool,vasilenkomike/tarantool,Sannis/tarantool,mejedi/tarantool,guard163/tarantool,nvoron23/tarantool,Sannis/tarantool,mejedi/tarantool,rtsisyk/tarantool,guard163/tarantool,vasilenkomike/tarantool