Rename Regenerator#write to Regenerator#write_metadata

lib/jekyll/regenerator.rb

@@ -103,7 +103,7 @@ module Jekyll
     # Write the metadata to disk
     #
     # Returns nothing.
-    def write
+    def write_metadata
       File.open(metadata_file, 'w') do |f|
         f.write(metadata.to_yaml)
       end

lib/jekyll/site.rb

@@ -325,7 +325,7 @@ module Jekyll
       each_site_file { |item|
         item.write(dest) if regenerator.regenerate?(item)
       }
-      regenerator.write unless full_rebuild?
+      regenerator.write_metadata unless full_rebuild?
     end
 
     # Construct a Hash of Posts indexed by the specified Post attribute.