Adjust indent [ci skip]

Author: nobu

lib/rdoc/options.rb

@@ -802,7 +802,7 @@ def parse argv
 
       opt.separator nil
 
-       opt.on("-mTAGS", "--meta-tags=TAGS",
+      opt.on("-mTAGS", "--meta-tags=TAGS",
              "Meta tags to be included in the HTML head") do |value|
         @meta_tags = JSON.parse(value)
       rescue  JSON::ParserError, TypeError