change wording of error and status messages for greater clarity.

No change in logic.

testsuite/expect/test12.2

@@ -176,11 +176,11 @@ if { $mem_used == -1 } {
 set diff_mem [expr $mem_used - $mem_size]
 set error_mem [expr abs($diff_mem)]
 if {$error_mem > 4000} {
-	send_user "\nFAILURE: sacct memory use error of $error_mem KB\n"
+	send_user "\nFAILURE: sacct memory use discrepancy of $error_mem KB\n"
 	send_user "  Wanted $mem_size KB, got $mem_used KB\n"
 	set exit_code 1
 } else {
-	send_user "\nSUCCESS: sacct memory use error of $error_mem KB\n"
+	send_user "\nSUCCESS: sacct memory use discrepancy of $error_mem KB\n"
 }
 
 #
@@ -254,11 +254,11 @@ expect {
 set diff_time [expr $elapsed_time - $sleep_time]
 set error_time [expr abs($diff_time)]
 if {$error_time > 5} {
-	send_user "\nFAILURE: sacct elapsed time error of $error_time secs\n"
+	send_user "\nFAILURE: sacct elapsed time discrepancy of $error_time secs\n"
 	send_user "  Wanted $sleep_time secs, got $error_time secs\n"
 	set exit_code 1
 } else {
-	send_user "\nSUCCESS: sacct elapsed time error of $error_time secs\n"
+	send_user "\nSUCCESS: sacct elapsed time discrepancy of $error_time secs\n"
 }
 
 set mem_used -1
@@ -312,11 +312,11 @@ if { $mem_used == -1 } {
 set diff_mem [expr $mem_used - $mem_size]
 set error_mem [expr abs($diff_mem)]
 if {$error_mem > 4000} {
-	send_user "\nFAILURE: sacct memory use error of $error_mem KB\n"
+	send_user "\nFAILURE: sacct memory use discrepancy of $error_mem KB\n"
 	send_user "  Wanted $mem_size KB, got $mem_used KB\n"
 	set exit_code 1
 } else {
-	send_user "\nSUCCESS: sacct memory use error of $error_mem KB\n"
+	send_user "\nSUCCESS: sacct memory use discrepancy of $error_mem KB\n"
 }
 
 if {$aix == 1 && $exit_code == 1} {