Double bar: support for codes missing #3142
Description
?- L= "abc"||K. L = [a,b,c|K]. ?- set_prolog_flag(double_quotes, atom). true. ?- L= "abc"||K. error(syntax_error(incomplete_reduction),read_term/3:1). % good ?- set_prolog_flag(double_quotes, codes). true. ?- L= "abc"||K. error(syntax_error(incomplete_reduction),read_term/3:1), unexpected.