Better reporting for invalid test cases; correction of need-Bash classification

git-svn-id: https://svn.code.sf.net/p/netpbm/code/trunk@4578 9d0c8265-081b-0410-96cb-a4ca84ce46f8

Author: giraffedata

test/pamarith.ok

@@ -233,45 +233,45 @@ Prints 2247801875 481 three times, then 320101399 59 three times
 -xor
 320101399 59
 Test Invalid
-Expected failure 1 1
-Expected failure 2 1
-Expected failure 3 1
-Expected failure 4 1
-Expected failure 5 1
-Expected failure 6 1
-Expected failure 7 1
-Expected failure 8 1
-Expected failure 9 1
-Expected failure 10 1
-Expected failure 11 1
-Expected failure 12 1
-Expected failure 13 1
-Expected failure 14 1
-Expected failure 15 1
-Expected failure 16 1
-Expected failure 17 1
-Expected failure 18 1
-Expected failure 19 1
-Expected failure 20 1
-Expected failure 21 1
-Expected failure 22 1
-Expected failure 23 1
-Expected failure 24 1
-Expected failure 25 1
-Expected failure 26 1
-Expected failure 27 1
-Expected failure 28 1
-Expected failure 29 1
-Expected failure 30 1
-Expected failure 31 1
-Expected failure 32 1
-Expected failure 33 1
-Expected failure 34 1
-Expected failure 35 1
-Expected failure 36 1
-Expected failure 37 1
-Expected failure 38 1
-Expected failure 39 1
-Expected failure 40 1
-Expected failure 41 1
-Expected failure 42 1
+Expected failure 1 (no output)
+Expected failure 2 (no output)
+Expected failure 3 (no output)
+Expected failure 4 (no output)
+Expected failure 5 (no output)
+Expected failure 6 (no output)
+Expected failure 7 (no output)
+Expected failure 8 (no output)
+Expected failure 9 (no output)
+Expected failure 10 (no output)
+Expected failure 11 (no output)
+Expected failure 12 (no output)
+Expected failure 13 (no output)
+Expected failure 14 (no output)
+Expected failure 15 (no output)
+Expected failure 16 (no output)
+Expected failure 17 (no output)
+Expected failure 18 (no output)
+Expected failure 19 (no output)
+Expected failure 20 (no output)
+Expected failure 21 (no output)
+Expected failure 22 (no output)
+Expected failure 23 (no output)
+Expected failure 24 (no output)
+Expected failure 25 (no output)
+Expected failure 26 (no output)
+Expected failure 27 (no output)
+Expected failure 28 (no output)
+Expected failure 29 (no output)
+Expected failure 30 (no output)
+Expected failure 31 (no output)
+Expected failure 32 (no output)
+Expected failure 33 (no output)
+Expected failure 34 (no output)
+Expected failure 35 (no output)
+Expected failure 36 (no output)
+Expected failure 37 (no output)
+Expected failure 38 (no output)
+Expected failure 39 (no output)
+Expected failure 40 (no output)
+Expected failure 41 (no output)
+Expected failure 42 (no output)