[tests-only][full-ci] Backport 7.1/ fix the correct regex on test script (#11650)

* fix: correct regex on test script

Signed-off-by: nabim777 <[email protected]>

* tests: add comment for behat output format handling

Signed-off-by: nabim777 <[email protected]>

---------

Signed-off-by: nabim777 <[email protected]>

Author: nabim777

tests/acceptance/run.sh

@@ -261,10 +261,11 @@ function run_behat_tests() {
 	FAILED_SCENARIO_PATHS_COLORED=`awk '/Failed scenarios:/',0 ${TEST_LOG_FILE} | grep -a feature`
 	# There will be some ANSI escape codes for color in the FEATURE_COLORED var.
 	# Strip them out so we can pass just the ordinary feature details to Behat.
+	# Also strip everything after ".feature:XX", including text such as "(on line xx)" added by Behat indicating the failing step's line number.
 	# Thanks to https://en.wikipedia.org/wiki/Tee_(command) and
 	# https://stackoverflow.com/questions/23416278/how-to-strip-ansi-escape-sequences-from-a-variable
 	# for ideas.
-	FAILED_SCENARIO_PATHS=$(echo "${FAILED_SCENARIO_PATHS_COLORED}" | sed "s/\x1b[^m]*m//g")
+	FAILED_SCENARIO_PATHS=$(echo "${FAILED_SCENARIO_PATHS_COLORED}" | sed "s/\x1b\[[0-9;]*m//g" | sed 's/\(\.feature:[0-9]\+\).*/\1/')
 
 	# If something else went wrong, and there were no failed scenarios,
 	# then the awk, grep, sed command sequence above ends up with an empty string.