Fix teacher test

sh/tests/solutions/teacher.sh

@@ -1,13 +1,7 @@
 #!/usr/bin/env bash
 
-PWD=$(pwd)
-
-for folder in $PWD
-do
-        cd "$folder" || exit
-        INTERVIEWNUMBER=$(head -n 179 streets/Buckingham_Place | tail -n 1 | cut -d "#" -f2)
-        echo "$INTERVIEWNUMBER"
-        cat interviews/interview-"$INTERVIEWNUMBER"
-        grep -A 4 L337 vehicles | grep -A 3 -B 1 Honda | grep -A 2 -B 2 Blue | grep -B 4 "Height: 6"
-        cat memberships/AAA memberships/Delta_SkyMiles memberships/Museum_of_Bash_History memberships/Terminal_City_Library| grep "$MAIN_SUSPECT" | wc -l
-done
+INTERVIEWNUMBER=$(head -n 179 streets/Buckingham_Place | tail -n 1 | cut -d "#" -f2)
+echo "$INTERVIEWNUMBER"
+cat interviews/interview-"$INTERVIEWNUMBER"
+grep -A 4 L337 vehicles | grep -A 3 -B 1 Honda | grep -A 2 -B 2 Blue | grep -B 4 "Height: 6"
+cat memberships/AAA memberships/Delta_SkyMiles memberships/Museum_of_Bash_History memberships/Terminal_City_Library| grep "$MAIN_SUSPECT" | wc -l

sh/tests/teacher_test.sh

@@ -9,7 +9,7 @@ script_dirS=$(cd -P "$(dirname "$BASH_SOURCE")" &>/dev/null && pwd)
 
 
 challenge() {
-	submitted=$(cd "$1" && "$script_dirS"/student/teacher.sh)
+	submitted=$(cd "$1" && "$script_dirS"/student/teacher.sh) || (echo "Your program crashed (non-zero status code)"; exit 1)
 	expected=$(cd "$1" && "$script_dirS"/solutions/teacher.sh)
 
 	if ! diff -q <(echo "$submitted") <(echo "$expected") &>/dev/null; then