ran rubocop -a

#5665

lib/jekyll/collection.rb

@@ -32,8 +32,8 @@ module Jekyll
     # Override of method_missing to check in @data for the key.
     def method_missing(method, *args, &blck)
       if docs.respond_to?(method.to_sym)
-        Jekyll.logger.warn "Deprecation:", "#{label}.#{method} should be changed to" \
-          "#{label}.docs.#{method}."
+        Jekyll.logger.warn "Deprecation:",
+          "#{label}.#{method} should be changed to #{label}.docs.#{method}."
         Jekyll.logger.warn "", "Called by #{caller.first}."
         docs.public_send(method.to_sym, *args, &blck)
       else
@@ -197,6 +197,7 @@ module Jekyll
     end
 
     private
+
     def read_document(full_path)
       doc = Jekyll::Document.new(full_path, :site => site, :collection => self)
       doc.read
@@ -208,6 +209,7 @@ module Jekyll
     end
 
     private
+
     def read_static_file(file_path, full_path)
       relative_dir = Jekyll.sanitized_path(
         relative_directory,