Tweak for the shell example

[lev]

Currently says

module use /depot/bioroc/etc/modulefiles
module load openfoam.com/2112

rcac-foam-shell # initialize singularity container 

RCAC_SCRATCH=/scratch/halstead/w/wu979
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

cp -rp ${FOAM_TUTORIALS} ${RCAC_SCRATCH}
exit    # exit out of singularity container 

Two comments:
a) Halstead-specific and wu979-specific example for the RCAC_SCRATCH line can be a ticket factory.
b) And more importantly, this line is not necessary (singularity shell does pass environment variables into the container, so $RCAC_SCRATCH is defined inside of that shell session anyways).

So safe to remove this line altogether.

[wu979]

You are right. RCAC_SCRATCH env is passed into the container. I deleted the line accordingly. Thanks for point this out!