The print_value() function in for-each-ref.c prints values to stdout
immediately using {sq|perl|python|tcl}_quote_print(). Change these
lower-level quote functions to instead leave their results in strbuf
so that we can later add post-processing to the results of them.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com> Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>