Fix unterminated quoted string error when running podman v4

Release candidates of podman v4 are unable to handle escape sequences inside strings.
See: containers/podman#13446
Work around this by using the println function instead.

code.sh

@@ -298,7 +298,7 @@ fi
 # different toolboxes step on each other.
 
 homevar="$(flatpak-spawn --host podman inspect "$container_name" \
-    --format='{{ range .Config.Env }}{{ . }}{{"\n"}}{{ end }}' \
+    --format='{{ range .Config.Env }}{{ println . }}{{ end }}' \
     | grep ^HOME=)"
 homevar="${homevar#HOME=}"
 

tests/test-basic.sh

@@ -11,7 +11,7 @@ test_basic() {
 
     assert_contents /logs/basic.cmd <<'EOF'
 flatpak list --app --columns=application
-podman inspect toolbox-vscode-test --format={{ range .Config.Env }}{{ . }}{{"\n"}}{{ end }}
+podman inspect toolbox-vscode-test --format={{ range .Config.Env }}{{ println . }}{{ end }}
 flatpak ps --columns=instance,application,pid
 flatpak run com.visualstudio.code --remote attached-container+746f6f6c626f782d7673636f64652d74657374 /home/testuser/project
 EOF
@@ -66,7 +66,7 @@ test_installation() {
 flatpak list --app --columns=application
 flatpak remotes --columns=name
 flatpak install flathub com.visualstudio.code
-podman inspect toolbox-vscode-test --format={{ range .Config.Env }}{{ . }}{{"\n"}}{{ end }}
+podman inspect toolbox-vscode-test --format={{ range .Config.Env }}{{ println . }}{{ end }}
 flatpak ps --columns=instance,application,pid
 flatpak run com.visualstudio.code --remote attached-container+746f6f6c626f782d7673636f64652d74657374 /home/testuser/project
 EOF
@@ -98,7 +98,7 @@ test_running() {
 
     assert_contents /logs/running.cmd <<'EOF'
 flatpak list --app --columns=application
-podman inspect toolbox-vscode-test --format={{ range .Config.Env }}{{ . }}{{"\n"}}{{ end }}
+podman inspect toolbox-vscode-test --format={{ range .Config.Env }}{{ println . }}{{ end }}
 flatpak ps --columns=instance,application,pid
 flatpak enter 123456 sh -c 
         cd $0