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try to understand it; maybe this will help someone else do so too. Default CVSRootDir to $CVSROOT first, then the path in ~vadve only if $CVSROOT was not set. Checkout with -z3 if we might be checking out over ssh/rsh. Check the filename of gnuplot to see if it is executable; if not, as a last resort, try just plain "gnuplot", hoping it is in the path somewhere. Remove a little extra whitespace. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9046 91177308-0d34-0410-b5e6-96231b3b80d8