Differences between JRuby and Ruby2 Ripper output

JRuby_Output.txt

SOURCE: defined?(a)
RESULT:
[:program, [:stmts_add, [:stmts_new], [:defined, [:@rparen, ")", [1, 10]]]]]

SOURCE: "my name is #{name}"
RESULT:
[:program,
 [:stmts_add,
  [:stmts_new],
  [:string_literal,
   [:string_add,
    [:string_add,
     [:string_content],
     [:@tstring_content, "my name is ", [1, 1]]],
    [:string_embexpr, [:@rbrace, "}", [1, 18]]]]]]]

SOURCE: /#{name}/
RESULT:
[:program,
 [:stmts_add,
  [:stmts_new],
  [:regexp_literal,
   [:regexp_add, [:regexp_new], [:string_embexpr, [:@rbrace, "}", [1, 7]]]],
   [:@regexp_end, "/", [1, 8]]]]]

SOURCE: ->() { }
RESULT:
[:program,
 [:stmts_add,
  [:stmts_new],
  [:lambda,
   [:params, nil, nil, nil, nil, nil],
   [:stmts_add, [:stmts_new], [:void_stmt]]]]]

SOURCE: a >= 3
RESULT:
[:program,
 [:stmts_add,
  [:stmts_new],
  [:binary, [:vcall, [:@ident, "a", [1, 0]]], :<=, [:@int, "3", [1, 5]]]]]

problems.rb

require 'ripper'
require 'pp'

def show(source)
  sexp = Ripper::SexpBuilder.new(source).parse
  puts "SOURCE: #{source}"
  puts "RESULT:"
  pp sexp
  puts
end

show "defined?(a)"
show '"my name is #{name}"'
show '/#{name}/'
show "->() { }"
show "a >= 3"

ruby2_output.txt

SOURCE: defined?(a)
RESULT:
[:program,
 [:stmts_add, [:stmts_new], [:defined, [:vcall, [:@ident, "a", [1, 9]]]]]]

SOURCE: "my name is #{name}"
RESULT:
[:program,
 [:stmts_add,
  [:stmts_new],
  [:string_literal,
   [:string_add,
    [:string_add,
     [:string_content],
     [:@tstring_content, "my name is ", [1, 1]]],
    [:string_embexpr,
     [:stmts_add, [:stmts_new], [:vcall, [:@ident, "name", [1, 14]]]]]]]]]

SOURCE: /#{name}/
RESULT:
[:program,
 [:stmts_add,
  [:stmts_new],
  [:regexp_literal,
   [:regexp_add,
    [:regexp_new],
    [:string_embexpr,
     [:stmts_add, [:stmts_new], [:vcall, [:@ident, "name", [1, 3]]]]]],
   [:@regexp_end, "/", [1, 8]]]]]

SOURCE: ->() { }
RESULT:
[:program,
 [:stmts_add,
  [:stmts_new],
  [:lambda,
   [:paren, [:params, nil, nil, nil, nil, nil, nil, nil]],
   [:stmts_add, [:stmts_new], [:void_stmt]]]]]

SOURCE: a >= 3
RESULT:
[:program,
 [:stmts_add,
  [:stmts_new],
  [:binary, [:vcall, [:@ident, "a", [1, 0]]], :>=, [:@int, "3", [1, 5]]]]]