tweaked tests to reflect fix for mutually exclusive switches

tests/test57.out

@@ -1,5 +1,5 @@
-PARSE ERROR:  
-             Too many arguments!
+PARSE ERROR: Argument: -i (--iii)
+             Mutually exclusive argument already set!
 
 Brief USAGE: 
    ../examples/test5  {-a <string>|-b <string>} {--eee <string>|--fff

tests/test57.sh

@@ -1,6 +1,8 @@
 #!/bin/sh
 
 # failure
+# This used to fail on the "Too many arguments!" but now fails sooner,
+# and on a more approriate error.
 ../examples/test5 --aaa asdf -c fdas --fff blah -i one -i two -j huh > tmp.out 2>&1
 
 if cmp -s tmp.out $srcdir/test57.out; then

tests/test76.out

@@ -1,4 +1,4 @@
-PARSE ERROR: Argument: -a (--atmc)
+PARSE ERROR: Argument: -b (--btmc)
              Mutually exclusive argument already set!
 
 Brief USAGE: