Join the path as a file path with path.join

The path is not a url so the hard coded separator / should not be used.

Its still file paths even if its .html files.

path.join is used to join the dir and the file.

Author: martinvehmas

lib/index.js

@@ -3,6 +3,7 @@ var basename = require('path').basename;
 var debug = require('debug')('metalsmith-markdown');
 var dirname = require('path').dirname;
 var extname = require('path').extname;
+var join = require('path').join;
 var marked = require('marked');
 
 /**
@@ -31,7 +32,7 @@ function plugin(options){
       var data = files[file];
       var dir = dirname(file);
       var html = basename(file, extname(file)) + '.html';
-      if ('.' != dir) html = dir.replace(/\\/g, '/') + '/' + html;
+      if ('.' != dir) html = join(dir, html);
 
       debug('converting file: %s', file);
       var str = marked(data.contents.toString(), options);