fixed problem in Action.__repr__() (untested)
fixed problem in Action.__repr__() (untested)

lino-framework/lino,khchine5/lino,lino-framework/lino,lsaffre/lino,lino-framework/lino,lsaffre/lino,khchine5/lino,khchine5/lino,lsaffre/lino,khchine5/lino,khchine5/lino,lsaffre/lino,lsaffre/lino,lino-framework/lino,lino-framework/lino