fix typos
Merge pull request #2954 from jw2013/typo

Fix Typos
smart_engine: Rephrases doc
Merge pull request #2955 from duggiefresh/smart-engine-typo-fix

smart_engine: Rephrases doc
Add cover directory from 'mix test --cover' to default .gitignore
Merge pull request #2960 from bgianfo/master

Add cover directory from 'mix test --cover' to default .gitignore
Optimize reduce for maps
Keep .gitignore ordering
Fix bootstrap issues
Improve docs for URI
Further improve URI parse docs
Fix mix shell tests when ansi escapes are disabled