Messages may have escaped characters

Signed-off-by: Junjie Mao <eternal.n08@gmail.com>

labcodes/lab1/tools/grade.sh

@@ -105,7 +105,7 @@ show_msg() {
 	echo $1
 	shift
 	if [ $# -gt 0 ]; then
-		echo "$@" | awk '{printf "   %s\n", $0}'
+		echo -e "$@" | awk '{printf "   %s\n", $0}'
 		echo
 	fi
 }

labcodes/lab2/tools/grade.sh

@@ -105,7 +105,7 @@ show_msg() {
     echo $1
     shift
     if [ $# -gt 0 ]; then
-        echo "$@" | awk '{printf "   %s\n", $0}'
+        echo -e "$@" | awk '{printf "   %s\n", $0}'
         echo
     fi
 }

labcodes/lab3/tools/grade.sh

@@ -105,7 +105,7 @@ show_msg() {
     echo $1
     shift
     if [ $# -gt 0 ]; then
-        echo "$@" | awk '{printf "   %s\n", $0}'
+        echo -e "$@" | awk '{printf "   %s\n", $0}'
         echo
     fi
 }

labcodes/lab4/tools/grade.sh

@@ -105,7 +105,7 @@ show_msg() {
     echo $1
     shift
     if [ $# -gt 0 ]; then
-        echo "$@" | awk '{printf "   %s\n", $0}'
+        echo -e "$@" | awk '{printf "   %s\n", $0}'
         echo
     fi
 }

labcodes/lab5/tools/grade.sh

@@ -105,7 +105,7 @@ show_msg() {
     echo $1
     shift
     if [ $# -gt 0 ]; then
-        echo "$@" | awk '{printf "   %s\n", $0}'
+        echo -e "$@" | awk '{printf "   %s\n", $0}'
         echo
     fi
 }

labcodes/lab6/tools/grade.sh

@@ -105,7 +105,7 @@ show_msg() {
     echo $1
     shift
     if [ $# -gt 0 ]; then
-        echo "$@" | awk '{printf "   %s\n", $0}'
+        echo -e "$@" | awk '{printf "   %s\n", $0}'
         echo
     fi
 }

labcodes/lab7/tools/grade.sh

@@ -105,7 +105,7 @@ show_msg() {
     echo $1
     shift
     if [ $# -gt 0 ]; then
-        echo "$@" | awk '{printf "   %s\n", $0}'
+        echo -e "$@" | awk '{printf "   %s\n", $0}'
         echo
     fi
 }

labcodes/lab8/tools/grade.sh

@@ -105,7 +105,7 @@ show_msg() {
     echo $1
     shift
     if [ $# -gt 0 ]; then
-        echo "$@" | awk '{printf "   %s\n", $0}'
+        echo -e "$@" | awk '{printf "   %s\n", $0}'
         echo
     fi
 }