fixed all lint errors except ones which require refactoring of code

lib/appenders/smtp.js

@@ -1,14 +1,17 @@
-var layouts = require("../layouts"),
-mailer = require("nodemailer"),
-os = require('os');
+"use strict";
+var layouts = require("../layouts")
+, mailer = require("nodemailer")
+, os = require('os');
 
 /**
 * SMTP Appender. Sends logging events using SMTP protocol. 
-* It can either send an email on each event or group several logging events gathered during specified interval.
+* It can either send an email on each event or group several 
+* logging events gathered during specified interval.
 *
 * @param config appender configuration data
+*    config.sendInterval time between log emails (in seconds), if 0
+*    then every event sends an email
 * @param layout a function that takes a logevent and returns a string (defaults to basicLayout).
-* all events are buffered and sent in one email during this time; if 0 than every event sends an email
 */
 function smtpAppender(config, layout) {
 	layout = layout || layouts.basicLayout;
@@ -19,7 +22,7 @@ function smtpAppender(config, layout) {
 	var sendTimer;
 	
 	function sendBuffer() {
-	  if (logEventBuffer.length == 0) {
+    if (logEventBuffer.length === 0) {
 			return;
     }
 		
@@ -31,11 +34,11 @@ function smtpAppender(config, layout) {
 		}
 		
 		var msg = {
-				to: config.recipients,
-				subject: config.subject || subjectLayout(firstEvent),
-				text: body,
-				headers: {"Hostname": os.hostname()}
-			};
+			to: config.recipients,
+			subject: config.subject || subjectLayout(firstEvent),
+			text: body,
+			headers: {"Hostname": os.hostname()}
+		};
 		if (config.sender) {
 			msg.from = config.sender;
     }