fix typo in comments

lib/language_pack/base.rb

@@ -153,7 +153,7 @@ def run_stdout(command)
     %x{ #{command} 2>/dev/null }
   end
 
-  # run a shell command and stream the ouput
+  # run a shell command and stream the output
   # @param [String] command to be run
   def pipe(command)
     output = ""