update doc (add Pathname#binread)

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@22671 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

NEWS

@@ -139,8 +139,9 @@ with all sufficient information, see the ChangeLog file.
 
 * pathname
   * new methods:
-    * realdirpath
-    * each_child
+    * Pathname#binread
+    * Pathname#realdirpath
+    * Pathname#each_child
 
 * Readline
   * new methods:

lib/pathname.rb

@@ -167,6 +167,7 @@
 # These methods are a facade for IO:
 # - #each_line(*args, &block)
 # - #read(*args)
+# - #binread(*args)
 # - #readlines(*args)
 # - #sysopen(*args)
 #