Add spec for overly strict map-get
Enable the specs to issue 492
Merge pull request #96 from xzyfer/wip/activate-issue-492

Enable the specs to issue 492
Merge pull request #93 from xzyfer/fix/issue_557

Add spec for overly strict map-get (issue 557)
Revert "Enable the specs to issue 492"
Merge pull request #97 from sass/revert-96-wip/activate-issue-492

Revert "Enable the specs to issue 492"