resolve github #482 Array#zip with infinite enum results in OOM
regression test for gh #482
fix grammar & typo in gh-482 regression spec
Merge pull request #487 from tychobrailleur/fixdoc

Update link to github Wiki.
Unused import
Merge pull request #485 from isaiah/master

Resolve #482 Array#zip with infinite enum results in OOM
Add missing throw to default_internal=.