docs: remove trailing whitespace in readme

Author: dougwilson

Readme.md

@@ -396,7 +396,7 @@ constructor. In addition to those options pools accept a few extras:
 
 ### connection
 
-The pool will emit a `connection` event when a new connection is made within the pool. 
+The pool will emit a `connection` event when a new connection is made within the pool.
 If you need to set session variables on the connection before it gets used, you can
 listen to the `connection` event.
 
@@ -465,7 +465,7 @@ poolCluster.getConnection('MASTER', function (err, connection) {});
 // Target Group : SLAVE1-2, Selector : order
 // If can't connect to SLAVE1, return SLAVE2. (remove SLAVE1 in the cluster)
 poolCluster.on('remove', function (nodeId) {
-  console.log('REMOVED NODE : ' + nodeId); // nodeId = SLAVE1 
+  console.log('REMOVED NODE : ' + nodeId); // nodeId = SLAVE1
 });
 
 poolCluster.getConnection('SLAVE*', 'ORDER', function (err, connection) {});
@@ -487,7 +487,7 @@ poolCluster.end(function (err) {
 ### PoolCluster options
 
 * `canRetry`: If `true`, `PoolCluster` will attempt to reconnect when connection fails. (Default: `true`)
-* `removeNodeErrorCount`: If connection fails, node's `errorCount` increases. 
+* `removeNodeErrorCount`: If connection fails, node's `errorCount` increases.
   When `errorCount` is greater than `removeNodeErrorCount`, remove a node in the `PoolCluster`. (Default: `5`)
 * `restoreNodeTimeout`: If connection fails, specifies the number of milliseconds
   before another connection attempt will be made. If set to `0`, then node will be
@@ -1018,7 +1018,7 @@ connection.beginTransaction(function(err) {
         return connection.rollback(function() {
           throw error;
         });
-      }  
+      }
       connection.commit(function(err) {
         if (err) {
           return connection.rollback(function() {