Avoid line-continuation in cshell assignment
As noted during #1667 (closed), there is an issue with BSD-csh.
The following construct looks ok, and works fine with tcsh but fails with BSD csh.
# Obtain major.minor from `paraview --version`
set pv_api=`paraview --version | \
sed -ne 's/^[^0-9]*\([0-9][0-9]*\.[0-9][0-9]*\).*$/\1/p'`
Need to use the uglier form, without continuations
set pv_api=`paraview --version | sed -ne 's/^[^0-9]*\([0-9][0-9]*\.[0-9][0-9]*\).*$/\1/p'`
Not entirely clear why this is.