* Error messages for invalid number ranges and string lengths have been uniformed and changed.

* Error messages for invalid ranges are now on the form:
  ```
    Number 23 out of range: 1-10
    String length 23 out of range: 1-10
  ```

test/all.sh

@@ -6,7 +6,8 @@
 : ${pattern:=test_*.sh}
 
 if [ $# -gt 0 ]; then 
-    echo "usage: $0 # detailed logs and stopon first error"
+    echo "usage: $0 # detailed logs and stop on first error. Use pattern=\"\" $0 to"
+    echo "     Use pattern=<pattern> $0 to narrow down test cases"
     exit -1
 fi