Smarter expansion of ruby heredoc contents
When mutating er/try-expand-list, safely copy the default value first
Add a feature spec for ruby heredoc expansion
Let cask call package-initialize, don't call it directly

See #121
Update path to cask
Merge pull request #122 from purcell/patch-1

Let cask call package-initialize, don't call it directly
Merge pull request #121 from purcell/ruby-heredoc

Smarter expansion of ruby heredoc contents