Rename is_* methods to *?
Add whitespace
Use guard
Use !var.nil? instead of !!var for rubocop
No need to do assignment
Use guard
I want this useless assignment, so keep it
Disable rubocop check for guard
Use a guard
Disable cops
Use unless instead of if on a negative expression
Remove useless assignment
Disable GuardClause in dont_interrupt and use a guard in configure
Merge pull request #381 from continuuity/feature/code-cleanups

Feature/code cleanups