neosnippet.vim/autoload/neosnippet/snippets/eruby.snip

snippet     ruby_print
abbr        <%= %>
    <%= ${1:TARGET} %>${2}

snippet     ruby_code
abbr        <% %>
    <% ${1:TARGET} %>${2}

snippet     ruby_print_nonl
abbr        <%= -%>
    <%= ${1:TARGET} -%>${2}

snippet     ruby_code_nonl
abbr        <% -%>
    <% ${1:TARGET} -%>${2}

snippet     comment
abbr        <%# %>
    <%# ${1:TARGET} %>${2}