Fix doc with default value with GH-523

* lib/tempfile.rb (Tempfile#initialize): [DOC] the first parameter
  `basename` is optional and defaulted to an empty string since
  [GH-523].  [Fix GH-1225]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53668 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Wed Jan 27 16:34:35 2016  boshan  <boshan@subsplash.com>
+
+	* lib/tempfile.rb (Tempfile#initialize): [DOC] the first parameter
+	  `basename` is optional and defaulted to an empty string since
+	  [GH-523].  [Fix GH-1225]
+
 Wed Jan 27 16:25:54 2016  Koichi ITO  <koic.ito@gmail.com>
 
 	* array.c (rb_ary_dig): [DOC] fix the exception class to be raised

lib/tempfile.rb

@@ -80,7 +80,7 @@
 # mutex.
 class Tempfile < DelegateClass(File)
   # call-seq:
-  #    new(basename, [tmpdir = Dir.tmpdir], [options])
+  #    new(basename = "", [tmpdir = Dir.tmpdir], [options])
   #
   # Creates a temporary file with permissions 0600 (= only readable and
   # writable by the owner) and opens it with mode "w+".