Pull initialization code out of begin block

Library/Homebrew/extend/pathname.rb

@@ -106,6 +106,7 @@ class Pathname
   def atomic_write content
     require "tempfile"
     tf = Tempfile.new(basename.to_s, dirname)
+    begin
       tf.binmode
       tf.write(content)
 
@@ -128,6 +129,7 @@ class Pathname
     ensure
       tf.close!
     end
+  end
 
   def default_stat
     sentinel = parent.join(".brew.#{Process.pid}.#{rand(Time.now.to_i)}")