In AsciiDoc, double parentheses are used to mark flow index terms, but in this document, their use is intended to be interpreted by the shell's arithmetic expansion. By escaping them with a backslash in the AsciiDoc, they pass through as-is to the manpage and other targets.
So, instead of a rendered result of `dd if=~/wipefs-sdb-0x00000438.bak of=/dev/sdb seek=$0x00000438 bs=1 conv=notrunc`, we get `dd if=~/wipefs-sdb-0x00000438.bak of=/dev/sdb seek=$((0x00000438)) bs=1 conv=notrunc`.
Seperately, when interpreted by a shell's arithmetic expansion, the 0x00000438 hex is converted to decimal 1080 `dd if=~/wipefs-sdb-0x00000438.bak of=/dev/sdb seek=1080 bs=1 conv=notrunc`
We need to evaluate "include::" directive relatively to project
top-level source directory rather than to the current document
location.
Signed-off-by: Karel Zak <kzak@redhat.com>