Builder method_missing overrides even Object and Kernel methods

[aks]

The XmlMarkup class overrides any method that is not part of its class, including Object and/or Kernel methods.

Simple examples:

[2] DEVELOPMENT(main)> xml = Builder::XmlMarkup.new
=> <is_a?>String</is_a?><inspect/>

I'm thinking that the is_a? method is being applied because irb is evaluating the argument.

[3] DEVELOPMENT(main)> puts xml.inspect
<is_a?>String</is_a?><inspect/><inspect/>
=> nil

Yep. An explicit use of inspect causes another tag to be inserted.

It should be possible to use Ruby's Object and/or Kernel methods on an XmlMarkup instance without getting matching tags automatically inserted.

Some exceptions, like p and name, may need to be allowed, since those methods might also be common tags.