Fixed a minor BNF grammar documentation problem.
Fixed a minor BNF grammar documentation problem.

DataDog/sensei,javasoze/sensei,DataDog/sensei,javasoze/sensei,senseidb/sensei,DataDog/sensei,javasoze/sensei,senseidb/sensei,senseidb/sensei,javasoze/sensei,DataDog/sensei,senseidb/sensei