1.9 style
Exclude such files
[Rubocop] Use alias_method
[Rubocop] Never use unless-else-end
Turn collection_methods cop off

Thinking about map&collect, reduce&inject is useless and meaningless.
We should focus another problems.
[Rubocop] #== should have argument named other
[rubocop] Avoid multi-line method chain
Use alias_method
Use single quoted string when suitable
Remove extra empty lines and trailing spaces
[Rubocop] Use `exist?` due to deprecation
Disable method length cop limitedly

- Splitting reduces readability
Disable meaningless tests for a while

- These examples don't make sence
- Slowing down the test speed (assets compiling)