test-charset: Divulge mhshow output if iconv_open(3) doesn't gripe.

Andy Bradford was finding the grep failed, but was left with no
explanation that's what happened, or what the file that didn't match
contained.

diff --git a/test/mhshow/test-charset b/test/mhshow/test-charset
index e87f0a5..79e8d52 100755 (executable)
--- a/test/mhshow/test-charset
+++ b/test/mhshow/test-charset
@@ -146,10 +146,13 @@ EOF
 run_prog mhshow $msgnum > $actual 2>&1
 if [ $iconv_elides_question_marks -eq 1 ]; then
     check "$expected" "$actual"
 run_prog mhshow $msgnum > $actual 2>&1
 if [ $iconv_elides_question_marks -eq 1 ]; then
     check "$expected" "$actual"

+elif grep "Can't convert .*us-ascii to UTF-8" "$actual" >/dev/null; then
+    :

 else
 else

-    grep "Can't convert .*us-ascii to UTF-8" "$actual" >/dev/null  ||  failed=1
+    echo 'iconv complaint not found'
+    sed -n l "$actual"
+    failed=1

 fi
 
 fi
 

-

 finish_test
 exit $failed
 finish_test
 exit $failed