refactor: use printf directly instead of string concatenation

Replace string concatenation with direct printf calls for building
the profiles list message. This is more maintainable and consistent
with other printf statements in the script.

Benefits:
- Avoids error-prone string building with ANSI escape sequences
- More consistent with the rest of the script
- Cleaner and easier to maintain
- No temporary variables needed

Addresses Copilot AI code review suggestion.

Author: gounthar

dockerfiles/codespacesURL.sh

@@ -25,17 +25,6 @@ fi
 # Define an array of available tutorial profiles
 targets=("maven" "node" "python" "multi" "cpp" "dotnet" "golang" "android" "default" "wizard")
 
-# Initialize message string
-message="📚 Available tutorial profiles: "
-
-# Build the profiles list message
-for target in "${targets[@]}"; do
-  message+="\033[36m${target}\033[0m, "
-done
-
-# Remove the trailing comma and space
-message=${message%??}
-
 # Display information to user
 printf "\n"
 printf "🚀 Jenkins Quickstart Tutorials Setup\n"
@@ -44,8 +33,19 @@ printf "\n"
 printf "Once you run \033[42;30mdocker compose --profile <profile-name> up\033[0m,\n"
 printf "Jenkins will be accessible at: \033[36m%s\033[0m\n" "${service_url}"
 printf "\n"
-printf "%b\n" "${message}"
-printf "\n"
+
+# Display available profiles with color formatting
+printf "📚 Available tutorial profiles: "
+first=true
+for target in "${targets[@]}"; do
+  if [ "${first}" = true ]; then
+    printf "\033[36m%s\033[0m" "${target}"
+    first=false
+  else
+    printf ", \033[36m%s\033[0m" "${target}"
+  fi
+done
+printf "\n\n"
 printf "Quick start commands:\n"
 for target in "${targets[@]}"; do
   printf "  • \033[42;30mdocker compose --profile %s up -d\033[0m - Start %s tutorial\n" "${target}" "${target}"