move EntryFilter class from global namespace into Jekyll module

lib/jekyll/entry_filter.rb

@@ -1,35 +1,37 @@
-class EntryFilter
-  attr_reader :site
-  def initialize(site)
-    @site = site
-  end
+module Jekyll
+  class EntryFilter
+    attr_reader :site
 
-  def filter(entries)
-    entries.reject do |e|
-      unless included?(e)
-        special?(e) || backup?(e) || excluded?(e) || symlink?(e)
+    def initialize(site)
+      @site = site
+    end
+
+    def filter(entries)
+      entries.reject do |e|
+        unless included?(e)
+          special?(e) || backup?(e) || excluded?(e) || symlink?(e)
+        end
       end
     end
-  end
 
-  def included?(entry)
-    site.include.glob_include?(entry)
-  end
+    def included?(entry)
+      site.include.glob_include?(entry)
+    end
 
-  def special?(entry)
-    ['.', '_', '#'].include?(entry[0..0])
-  end
+    def special?(entry)
+      ['.', '_', '#'].include?(entry[0..0])
+    end
 
-  def backup?(entry)
-    entry[-1..-1] == '~'
-  end
+    def backup?(entry)
+      entry[-1..-1] == '~'
+    end
 
-  def excluded?(entry)
-    site.exclude.glob_include?(entry)
-  end
+    def excluded?(entry)
+      site.exclude.glob_include?(entry)
+    end
 
-  def symlink?(entry)
-    File.symlink?(entry) && site.safe
+    def symlink?(entry)
+      File.symlink?(entry) && site.safe
+    end
   end
-
 end