Fix string escaping in code generator
Fix string escaping in code generator

The OCaml code emitted by Disk.print_ocaml is missing a String.escape
that was lost when the code was moved to use Bytes to make it
safe-string compliant. See commit

    7d96f3d9f9da2401884c6ebc1c2e984715719ca5

Signed-off-by: Christian Lindig <4f88b50bc9dba63c9a7d9e208d4b3ac6f1a52800@citrix.com>

djs55/ocaml-vhd