Use implicit begin

Library/Homebrew/utils.rb

@@ -260,7 +260,6 @@ end
 
 module GitHub extend self
   def open url, headers={}, &block
-    begin
     default_headers = {'User-Agent' => HOMEBREW_USER_AGENT}
     default_headers['Authorization'] = "token #{HOMEBREW_GITHUB_API_TOKEN}" if HOMEBREW_GITHUB_API_TOKEN
     Kernel.open(url, default_headers.merge(headers), &block)
@@ -271,7 +270,6 @@ module GitHub extend self
       raise e
     end
   end
-  end
   
   def issues_for_formula name
     # bit basic as depends on the issue at github having the exact name of the