Fixes in code quality

lib/cmd.js

@@ -157,7 +157,7 @@ exports.Servant = class {
             return this.processCommand(msg, globResult, content);
         } else  if (commands.length < (config.maxCmdSequenceLength  || 5)) {
             let answers = [];
-            let previousCommand = (commands[0].match(/^.\w+/) || [])[0];;
+            let previousCommand = (commands[0].match(/^.\w+/) || [])[0];
             for (let i = 0; i < commands.length; i++) {
                 answers.push(this.processCommand(msg, globResult[i], commands[i],
                     true, previousCommand)); // return function to avoid "race conditions"