Fix code style issues

lib/index.js

@@ -1,7 +1,7 @@
-var os = require('os'),
-  fs = require('fs'),
-  path = require('path'),
-  spawn = require('child_process').spawn
+// var os = require('os')
+// var fs = require('fs')
+var path = require('path')
+var spawn = require('child_process').spawn
 
 var mkdirp = require('mkdirp')
 
@@ -10,22 +10,22 @@ var phantomscript = path.join(__dirname, 'phantomscript.js')
 module.exports = { process: processMermaid }
 
 function processMermaid (files, _options, _next) {
-  var options = _options || {},
-    outputDir = options.outputDir || process.cwd(),
-    outputSuffix = options.outputSuffix || '',
-    next = _next || function () {},
-    phantomArgs = [
-      phantomscript,
-      outputDir,
-      options.png,
-      options.svg,
-      options.css,
-      options.sequenceConfig,
-      options.ganttConfig,
-      options.verbose,
-      options.width,
-      outputSuffix
-    ]
+  var options = _options || {}
+  var outputDir = options.outputDir || process.cwd()
+  var outputSuffix = options.outputSuffix || ''
+  var next = _next || function () { }
+  var phantomArgs = [
+    phantomscript,
+    outputDir,
+    options.png,
+    options.svg,
+    options.css,
+    options.sequenceConfig,
+    options.ganttConfig,
+    options.verbose,
+    options.width,
+    outputSuffix
+  ]
 
   files.forEach(function (file) {
     phantomArgs.push(file)
@@ -35,7 +35,7 @@ function processMermaid (files, _options, _next) {
     if (err) {
       throw err
     }
-    phantom = spawn(options.phantomPath, phantomArgs)
+    var phantom = spawn(options.phantomPath, phantomArgs)
 
     phantom.on('exit', next)