Fix the syntax of installation commands
Fix the syntax of installation commands

This was reported by Shailen Sobhee

LWisteria/hpcg,hpcg-benchmark/hpcg,hpcg-benchmark/hpcg,hpcg-benchmark/hpcg,LWisteria/hpcg,hpcg-benchmark/hpcg,hpcg-benchmark/hpcg,hpcg-benchmark/hpcg,LWisteria/hpcg,LWisteria/hpcg