Shortest path does not receive target arg

[dangover94]

//====== Graph Benchmark Suites ======//
//========== Shortest Path ===========//
//
// Single-source shortest path
//
// Usage: ./sssp --dataset
// --root
// --target

@ubuntu:~/GraphBIG/benchmark/bench_shortestPath$ ./sssp --dataset /home/heydamy/GraphBIG/benchmark/bench_shortestPath/Knowledge_Repo --root 3 --target 20

________ .__ . ________
/ / ______ | |____ \ |/ /
/ \ _ __ _ \ _ | | | | / / \ ___
\ _\ \ | // __ | |> > Y \ | \ \ _\
___ /__| (___ / /|| /_____ /|___ /
/ /|__| / / /

==================================================================
Benchmark: sssp shortest path
[ERROR] unkown argument: --target
[Usage]:
--dataset: path of dataset files
default - '/home/heydamy/GraphBIG/benchmark/bench_shortestPath/Knowledge_Repo'
--help: print help info
--root: root/starting vertex
default - '3'
--separator: separators of csv dataset files
default - '|,'
--threadnum: thread number
default - '1'