fixup! tests: optionally write results as JUnit-style .xml

Actually, seems like \x1c is never valid in an XML... so let's use the
replacement character for such values.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

t/test-lib.sh

@@ -894,10 +894,10 @@ xml_attr_encode () {
 	printf '%s\n' "$@" |
 	sed -e 's/&/\&/g' -e "s/'/\'/g" -e 's/"/\"/g' \
 		-e 's/</\&lt;/g' -e 's/>/\&gt;/g' \
-		-e "s/$(printf \\x1c)/\\&#x1c;/g" \
-		-e "s/$(printf \\x1d)/\\&#x1d;/g" \
-		-e "s/$(printf \\x1e)/\\&#x1d;/g" \
-		-e "s/$(printf \\x1f)/\\&#x1f;/g" \
+		-e "s/$(printf \\x1c)/\\&#xfffd;/g" \
+		-e "s/$(printf \\x1d)/\\&#xfffd;/g" \
+		-e "s/$(printf \\x1e)/\\&#xfffd;/g" \
+		-e "s/$(printf \\x1f)/\\&#xfffd;/g" \
 		-e 's/	/\&#x09;/g' -e 's/$/\&#x0a;/' -e '$s/&#x0a;$//' |
 	tr -d '\012\015'
 }