Do not import IEx.Helpers since we delegate to them, closes, closes #957

Author: José Valim

lib/elixir/src/elixir_macros.erl

@@ -227,7 +227,8 @@ translate({defmodule, Meta, [Ref, KV]}, S) ->
       { TRef, S }
   end,
 
-  { elixir_module:translate(Meta, FRef, Block, FS#elixir_scope{check_clauses=true}), FS };
+  MS = FS#elixir_scope{check_clauses=true,local=nil},
+  { elixir_module:translate(Meta, FRef, Block, MS), FS };
 
 translate({Kind, Meta, [Call]}, S) when ?FUNS(Kind) ->
   translate({Kind, Meta, [Call, nil]}, S);

lib/iex/lib/iex/server.ex

@@ -4,7 +4,7 @@ defmodule IEx.Server do
   def start(config) do
     IO.puts "Interactive Elixir (#{System.version}) - press Ctrl+C to exit (type h() ENTER for help)"
     Process.put :iex_history, []
-    { _, _, scope } = :elixir.eval('import IEx.Helpers', [], 0, config.scope)
+    { _, _, scope } = :elixir.eval('require IEx.Helpers', [], 0, config.scope)
     do_loop(config.scope(scope))
   end