Fixes issue where LUKS encrypted XFS root will not boot

[UNIcodeX]

Issue is fixed by adding "xfs" to the "MODULES" list in
/etc/mkinitcpio.conf

See the following link for XFS and LUKS:
https://bbs.archlinux.org/viewtopic.php?pid=1748083#p1748083s://bbs.archlinux.org/viewtopic.php?pid=1748083#p1748083

NOTE:
I've changed the sed line from:
sed -i '/MODULES=/ s/.$/ xfs"/;s/" /"/' "$ARCH"/etc/mkinitcpio.conf

to:
sed -i '/MODULES=/ s/.$/ xfs )/;s/" /"/' "$ARCH"/etc/mkinitcpio.conf

The effect of the first example is:

...
#     MODULES=(piix ide_disk reiserfs xfs"
MODULES=( xfs"
...

and the effect of the changed line is:

...
#     MODULES=(piix ide_disk reiserfs xfs )
MODULES=( xfs )
...

Which brings up the points:
A) Am I missing something?
B) If not, then should all sed lines involving the MODULES= line in mkinitcpio.conf be changed to add a closing parentheses, rather than a space and a double quote?

[UNIcodeX]

Initial iso build and test install into a virtual box VM, using LUKS with xfs and quick install option, booted.

However, subsequent testing with LUKS and xfs, under the manual install, did not boot properly, due to not knowing what FS type it was (that is to say... The same issue).

Further testing required.

UPDATE: On the second test, I had chosen to update the installer, which downloaded the non-changed sources from the git repo, thus invalidating the changed ISO which was created. The attached screenshot shows that the MODULES= line is is changed to MODULES=( xfs ). Booting into OS after completion of installation to a LUKS encrypted XFS root is confirmed to be working.