Fix typos in runner_spec
Fix typos in util_spec
.map -> #map for consistency
Fixes typo in thor_spec.rb
Fixes typos in invocation_spec
Corrects typos in group_spec.rb
Fixes spelling and such in base_spec.rb
Fixes typo in runner_spec.rb
Merge pull request #345 from rthbound/patch-8

Patch 8 - Improves on readability of specs