Merge pull request #224 from townsen/fix_duplicated_log_messages

Fix duplicate messages

Author: leehambley

lib/sshkit/formatters/pretty.rb

@@ -34,6 +34,7 @@ def write_command(command)
                                              uuid(command) + c.green("\t" + line)]
               original_output << "\n" unless line[-1] == "\n"
             end
+            command.stdout = ''
           end
 
           unless command.stderr.empty?
@@ -42,6 +43,7 @@ def write_command(command)
                                              uuid(command) + c.red("\t" + line)]
               original_output << "\n" unless line[-1] == "\n"
             end
+            command.stderr = ''
           end
         end