strip_heredoc (String)

これ便利というかrubyで文字列作るなら必須だけどいつもググる。

Strips indentation in heredocs. For example in if options [ :usage ] puts <<- USAGE . strip_heredoc This command does such and such. Supported options are: -h This message ... USAGE end the user would see the usage message aligned against the left margin. Technically, it looks for the least indented line in the whole string, and removes that amount of leading whitespace.

Full article: http://apidock.com/rails/String/strip_heredoc