Rubocop: Style/ParenthesesAroundCondition

- Don't use parentheses around the condition of an if

lib/jekyll/plugin_manager.rb

@@ -76,7 +76,7 @@ module Jekyll
     #
     # Returns an Array of plugin search paths
     def plugins_path
-      if (site.config['plugins_dir'] == Jekyll::Configuration::DEFAULTS['plugins_dir'])
+      if site.config['plugins_dir'] == Jekyll::Configuration::DEFAULTS['plugins_dir']
         [site.in_source_dir(site.config['plugins_dir'])]
       else
         Array(site.config['plugins_dir']).map { |d| File.expand_path(d) }

lib/jekyll/regenerator.rb

@@ -115,7 +115,7 @@ module Jekyll
     #
     # Returns nothing.
     def add_dependency(path, dependency)
-      return if (metadata[path].nil? || @disabled)
+      return if metadata[path].nil? || @disabled
 
       unless metadata[path]["deps"].include? dependency
         metadata[path]["deps"] << dependency

lib/jekyll/utils.rb

@@ -62,7 +62,7 @@ module Jekyll
     end
 
     def value_from_singular_key(hash, key)
-      hash[key] if (hash.key?(key) || (hash.default_proc && hash[key]))
+      hash[key] if hash.key?(key) || (hash.default_proc && hash[key])
     end
 
     def value_from_plural_key(hash, key)