Add "*" to indicate repeated migrations in "list"

There is no way to show migrations as "repeated" when listing them.  It
is useful to know which migrations might run when running "migrate".

README.rst

@@ -112,17 +112,20 @@ Example usage::
     version        | name            | is applied | date applied
     ----------------------------------------------------------------------
     20151217170514   add_id_to_users   True         2016-01-31 00:15:01.692570+01:00
-    20151218145832   add_karen_to_us   False               
-    20160107200351   blah              False               
+    20151218145832   add_karen_to_us   False*              
+    20160107200351   blah              deferred            
+
+A `*` in the "is applied" column means that the migration is a repeated
+migration.
 
 To see the full migration name, use ``--wide``::
 
     $ dbmigrator --config=development.ini list --wide
     version        | name               | is applied | date applied
     ----------------------------------------------------------------------
     20151217170514   add_id_to_users      True         2016-01-31 00:15:01.692570+01:00
-    20151218145832   add_karen_to_users   False               
-    20160107200351   blah                 False               
+    20151218145832   add_karen_to_users   False*              
+    20160107200351   blah                 deferred            
 
 
 migrate

dbmigrator/commands/list.py

@@ -42,6 +42,8 @@ def cli_command(cursor, migrations_directory='', db_connection_string='',
             version, migration, migrated_versions)
         is_applied = deferred and 'deferred' or \
             bool(migrated_versions.get(version))
+        if hasattr(migration, 'should_run'):
+            is_applied = '{}*'.format(is_applied)
         print('{}   {}   {!s: <10}   {}'.format(
             version, name_format.format(migration_name[:name_width]),
             is_applied, migrated_versions.get(version) or ''))

dbmigrator/tests/test_cli.py

@@ -353,7 +353,7 @@ def test_deferred(self):
             self.target(cmd + ['list'])
 
         stdout = out.getvalue()
-        self.assertIn('20170810124056   empty             deferred     20',
+        self.assertIn('20170810124056   empty             deferred*    20',
                       stdout)
 
         # mark a deferred migration as not not been run
@@ -679,7 +679,13 @@ def cleanup():
         with testing.captured_output() as (out, err):
             self.target(cmd + ['migrate'])
 
-        self.target(cmd + ['list'])
+        with testing.captured_output() as (out, err):
+            self.target(cmd + ['list'])
+
+        stdout = out.getvalue()
+        self.assertIn('20170810093842   create_a_table    True ', stdout)
+        self.assertIn('20170810093943   repeat_insert_d   True*', stdout)
+        self.assertIn('20170810124056   empty             deferred*', stdout)
 
         # Version wise, the empty migration is more recent, but the repeat
         # migration is the last migration applied, so rollback should rollback