Correct comments.

testsuite/expect/README

@@ -389,7 +389,7 @@ test17.5   Confirm that sbatch stdout, and stderr options work (--output
            and --error option respectively, including use of %j specification)
 test17.6   Confirm that a job executes with the proper task count (--tasks
            option).
-test17.7   Confirm that sbatch sets appropriate working directory (--chdir
+test17.7   Confirm that sbatch sets appropriate working directory (--workdir
            option)
 test17.8   Confirm that sbatch sets appropriate time limit (--time
            option)

testsuite/expect/test17.7

 #!/usr/bin/expect
 ############################################################################
 # Purpose: Test of SLURM functionality
-#          Confirm that sbatch sets appropriate working directory (--chdir 
+#          Confirm that sbatch sets appropriate working directory (--workdir
 #          option)
 #
 # Output:  "TEST: #.#" followed by "SUCCESS" if test was successful, OR