code: def dry_run(self):
          
          if self.database_current_migration is None:
              self.printer(
                      u'~> Woulda initialized: %s\n' % self.name_for_printing())
              return u'inited'
  
          migrations_to_run = self.migrations_to_run()
          if migrations_to_run:
              self.printer(
                  u'~> Woulda updated %s:\n' % self.name_for_printing())
  
              for migration_number, migration_func in migrations_to_run():
                  self.printer(
                      u'   + Would update %s, "%s"\n' % (
                          migration_number, migration_func.func_name))
  
              return u'migrated'
docs: Print out a dry run of what we would have upgraded.