Need to use double brackets in bash script
Need to use double brackets in bash script

Closes: https://github.com/spesmilo/sx/issues/33

tuomassiren/libbitcoin-explorer,kaostao/sx,libtetcoin/libtetcoin-explorer,cancoin/libbitcoin-explorer,tuomassiren/libbitcoin-explorer,libtetcoin/libtetcoin-explorer,libmetrocoin/libmetrocoin-explorer,cancoin/libbitcoin-explorer,BWallet/sx,GroestlCoin/libgroestlcoin-explorer,BWallet/sx,kaostao/sx,GroestlCoin/libgroestlcoin-explorer,GroestlCoin/libgroestlcoin-explorer,BWallet/sx,kaostao/sx,libmetrocoin/libmetrocoin-explorer