I had something that needed a callback proc passed to it, but the callback needed only return the content of a configuration.

~~~ ruby
event_handler.run(:backoff => config.method(:backoff)) do
  # ...
end
~~~

The alternative, with arguably cleaner syntax is:

~~~ ruby
event_handler.run(:backoff => proc { config.backoff }) do
  # ...
end
~~~

Either is usable after my patch, and in truth I'd likely go with the later by the time I cleaned up the code for a commit, but I got an unexpected `NameError` with the first on the current release, so I thought I'd patch up the root cause.