Positional argument not parsed when passing additional args

[advand]

foo> config open foo                                                                                                                     
<Result>

foo> config open foo edit=True                                                                                                           
Error parsing command
config open foo edit=True
                ^
Expected end of text (at char 9), (line:1, col:10)

foo> config open cfg=foo edit=True
<Result>

cfg is positional and edit is non-positional with a default value