Win8 Strawberry 5.8.9.5 (32)  Sun 05/02/2021 21:06:46
C:\@Work\Perl\monks
>perl -Mstrict -Mwarnings

my $s = <<'EOT';
\b\\o\\\f\\\\f\
EOT
print "'$s' \n";

$s = q/\q\\u\\\u\\\\x\
/;
print "'$s' \n";

^Z
'\b\\o\\\f\\\\f\
'
'\q\u\\u\\x\
'