Fix non integer checks in ranges

Author: José Valim

lib/elixir/lib/code.ex

@@ -602,7 +602,7 @@ defmodule Code do
       "Converts an atom to a char list."
 
       # Module doesn't exist
-      iex> docs = Code.get_docs(ModuleNotGood, :all)
+      iex> Code.get_docs(ModuleNotGood, :all)
       nil
 
   """

lib/elixir/lib/enum.ex

@@ -1174,6 +1174,8 @@ defmodule Enum do
 
       iex> Enum.member?(1..10, 5)
       true
+      iex> Enum.member?(1..10, 5.0)
+      false
 
       iex> Enum.member?([:a, :b, :c], :d)
       false

lib/elixir/lib/range.ex

@@ -77,7 +77,7 @@ defimpl Enumerable, for: Range do
     {:done, acc}
   end
 
-  def member?(first .. last, value) do
+  def member?(first .. last, value) when is_integer(value) do
     validate_range!(first, last)
     if first <= last do
       {:ok, first <= value and value <= last}
@@ -86,6 +86,10 @@ defimpl Enumerable, for: Range do
     end
   end
 
+  def member?(_ .. _, _value) do
+    {:ok, false}
+  end
+
   def count(first .. last) do
     validate_range!(first, last)
     if first <= last do