Erb removes end of line wrap-%> usage

http://stackoverflow.com/questions/998979/difference-between-and-in-rails/25617607#25617607

In Ruby 2.1 (not necessarily with Rails), the - removes one trailing newline:

• The newline must is the first char after the>
• No spaces is removed
• Only a single newline is removed
• must pass the option to use ‘-‘ it

Examples:

Require' Erb 'ERB.New("<%= ' a '%>\nb").Result== "A\NB" OrRaiseBeginERB.New("<%= ' a '-%>\nb").Result; Rescue SyntaxError ; ElseRaise; EndERB.New("<%= ' a '%>\nb" , Nil, ‘-‘).Result== "A\NB" OrRaiseerb.New("<%= ' a '-%>\nb" , Nil, ‘-‘).Result== ' AB ' OrRaiseerb.New("<%= ' a '-%> \nb" , Nil, ‘-‘).Result== "A \nb" OrRaiseerb.New( "<%= ' a '-%>\n B"  ,nil,  '-' ). ==  ' a B '  or Raiseerb. ( "<%= ' a '-%>\n\nb" , nil,  '-' ). ==  "A\NB"  or< Span class= "PLN" > raise              

Erb removes the end of line wrapping-%> use