automatically git add pygments upstream when doing `rake vendor:upd…

…ate`

Rakefile

@@ -49,6 +49,7 @@ task(:build).enhance([:lexers])
 namespace :vendor do
   file 'vendor/pygments-main' do |f|
     sh "pip install --target=#{f.name} pygments"
+    sh "git add -- #{f.name}"
   end
 
   task :clobber do