Fix for multiple region data

[fchiba]

This PR is intended to fix #481

If we want [[a,b],[c,d]] from [[a,b]] and [c,d], we should use <<.

[coveralls]

Coverage increased (+0.05%) to 96.222% when pulling a68a40f on fchiba:fix-481 into 1abd2a3 on SlatherOrg:master.

[ksuther]

@hborawski Would love your feedback on this since it was your PR. Thanks!

[hborawski]

the test looks good, and im no ruby master, so if that operator is better for this then 👍

[ksuther]

Thanks for the PR!