remove anoying backtrace

lib/cmds/blockchain/blockchain.js

@@ -141,7 +141,9 @@ Blockchain.prototype.run = function() {
       return;
     }
     args = _.compact(args);
-    console.trace(`Geth command: ${cmd} ${args.join(' ')}`);
+
+    let full_cmd = cmd + " " + args.join(' ');
+    console.log(__("running: %s", full_cmd.underline).green);
     self.child = child_process.spawn(cmd, args, {cwd: process.cwd()});
 
     self.child.on('error', (err) => {