Update to Erlang 18

Author: José Valim

lib/elixir/test/elixir/exception_test.exs

@@ -291,7 +291,7 @@ defmodule Kernel.ExceptionTest do
 
   test "format_fa" do
     assert Exception.format_fa(fn -> end, 1) =~
-           ~r"#Function<\d\.\d+/0 in Kernel\.ExceptionTest\.test format_fa/1>/1"
+           ~r"#Function<\d+\.\d+/0 in Kernel\.ExceptionTest\.test format_fa/1>/1"
   end
 
   import Exception, only: [message: 1]

lib/elixir/test/elixir/protocol_test.exs

@@ -123,10 +123,10 @@ defmodule ProtocolTest do
   test "protocol defines callbacks" do
     if :erlang.system_info(:otp_release) >= '18' do
       assert get_callbacks(Sample, :ok, 1) ==
-        [{:type, 9, :fun, [{:type, 9, :product, [{:user_type, 9, :t, []}]}, {:type, 9, :boolean, []}]}]
+        [{:type, [9], :fun, [{:type, [9], :product, [{:user_type, [9], :t, []}]}, {:type, [9], :boolean, []}]}]
 
       assert get_callbacks(WithAny, :ok, 1) ==
-        [{:type, 16, :fun, [{:type, 16, :product, [{:user_type, 16, :t, []}]}, {:type, 16, :term, []}]}]
+        [{:type, [16], :fun, [{:type, [16], :product, [{:user_type, [16], :t, []}]}, {:type, [16], :term, []}]}]
     else
       assert get_callbacks(Sample, :ok, 1) ==
         [{:type, 9, :fun, [{:type, 9, :product, [{:type, 9, :t, []}]}, {:type, 9, :boolean, []}]}]

lib/elixir/test/elixir/stream_test.exs

@@ -340,9 +340,9 @@ defmodule StreamTest do
 
   test "interval/1" do
     stream = Stream.interval(10)
-    now = :erlang.now
+    now = :os.timestamp
     assert Enum.take(stream, 5) == [0, 1, 2, 3, 4]
-    assert :timer.now_diff(:erlang.now, now) > 50000
+    assert :timer.now_diff(:os.timestamp, now) > 50000
   end
 
   test "into/2 and run/1" do
@@ -622,9 +622,9 @@ defmodule StreamTest do
 
   test "timer/1" do
     stream = Stream.timer(10)
-    now = :erlang.now
+    now = :os.timestamp
     assert Enum.to_list(stream) == [0]
-    assert :timer.now_diff(:erlang.now, now) > 10000
+    assert :timer.now_diff(:os.timestamp, now) > 10000
   end
 
   test "unfold/2" do