Extracted `read_drafts` from site.rb into reader.rb

- Extracted
  - Updated References
  - Ran Tests

Signed-off-by: Martin Jorn Rogalla <martin@martinrogalla.com>

lib/jekyll/reader.rb

@@ -74,6 +74,22 @@ module Jekyll
       end
     end
 
+    # Read all the files in <source>/<dir>/_drafts and create a new Post
+    # object with each one.
+    #
+    # dir - The String relative path of the directory to read.
+    #
+    # Returns nothing.
+    def read_drafts(dir)
+      drafts = read_content(dir, '_drafts', Draft)
+
+      drafts.each do |draft|
+        if draft.published?
+          aggregate_post_info(draft)
+        end
+      end
+    end
+
     def read_content(dir, magic_dir, klass)
       get_entries(dir, magic_dir).map do |entry|
         klass.new(site, site.source, dir, entry) if klass.valid?(entry)

lib/jekyll/site.rb

@@ -147,7 +147,7 @@ module Jekyll
       entries = Dir.chdir(base) { reader.filter_entries(Dir.entries('.'), base) }
 
       read_posts(dir)
-      read_drafts(dir) if show_drafts
+      reader.read_drafts(dir) if show_drafts
       posts.sort!
       limit_posts! if limit_posts > 0 # limit the posts if :limit_posts option is set
 
@@ -182,22 +182,6 @@ module Jekyll
       end
     end
 
-    # Read all the files in <source>/<dir>/_drafts and create a new Post
-    # object with each one.
-    #
-    # dir - The String relative path of the directory to read.
-    #
-    # Returns nothing.
-    def read_drafts(dir)
-      drafts = reader.read_content(dir, '_drafts', Draft)
-
-      drafts.each do |draft|
-        if draft.published?
-          reader.aggregate_post_info(draft)
-        end
-      end
-    end
-
     # Read in all collections specified in the configuration
     #
     # Returns nothing.