The output from Kernel#caller has changed between 1.8 and 1.9. This
caused many of the 1.8 tests to fail. I've modified them all to pass
but I would greatly appreciate confirmation that in doing so I haven't
legitimized any bugs.

The examples in question are at
http://github.com/rubyspec/rubyspec/blob/0a18bd38800eec982aab88b8bc64188da9132a16/core/kernel/caller_spec.rb
Specifically:

* 1.8 specs: http://github.com/rubyspec/rubyspec/blob/0a18bd38800eec982aab88b8bc64188da9132a16/core/kernel/caller_spec.rb#L46
* 1.9 specs: http://github.com/rubyspec/rubyspec/blob/0a18bd38800eec982aab88b8bc64188da9132a16/core/kernel/caller_spec.rb#L94

Do these look right? :-)

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