Fix eslint errors

lib/Pool.js

@@ -23,26 +23,26 @@ function Pool(options) {
 function recycleStaleConnections()  {
   var now = Date.now();
   var min = null;
-  for(var i = 0; i < this._freeConnections.length; i++ )  {
+  for (var i = 0; i < this._freeConnections.length; i++ )  {
     var lastused = this._freeConnections[i]._usedTimestamp;
 
-    if(lastused !== undefined) {
-      if((now - lastused) >= this.config.idleTimeout) {
+    if (lastused !== undefined) {
+      if ((now - lastused) >= this.config.idleTimeout) {
         this._freeConnections[i].destroy();
         i--;
       } else {
         if(min == null) {
           min = now - lastused;
         } else {
-          if((now - lastused) < min)  {
+          if ((now - lastused) < min)  {
             min = now - lastused;
           }
         }
       }
     }
   }
-  if(min != null) {
-    if(min > 0) {
+  if (min != null) {
+    if (min > 0) {
       clearInterval(this._recycleTimer);
       this._recycleTimer   = setInterval(recycleStaleConnections.bind(this),this.config.idleTimeout);
     }
@@ -171,7 +171,7 @@ Pool.prototype.releaseConnection = function releaseConnection(connection) {
       throw new Error('Connection already released');
     } else {
       // add connection to end of free queue
-      if(this.config.idleTimeout > 0 && this._recycleTimer == null) {
+      if (this.config.idleTimeout > 0 && this._recycleTimer == null) {
         this._recycleTimer = setInterval(recycleStaleConnections.bind(this),this.config.idleTimeout);
       }
 
@@ -198,7 +198,7 @@ Pool.prototype.releaseConnection = function releaseConnection(connection) {
 
 Pool.prototype.end = function (cb) {
   this._closed = true;
-  if(this._recycleTimer) {
+  if (this._recycleTimer) {
     clearInterval(this._recycleTimer);
     this._recycleTimer = null;
   }

lib/PoolConnection.js

@@ -43,7 +43,7 @@ PoolConnection.prototype.end = function () {
               + 'deprecated. In next version calling conn.end() will be '
               + 'restored to default conn.end() behavior. Use '
               + 'conn.release() instead.'
-              );
+  );
   this.release();
 };