Add `system` support to `nvm_print_versions`
diff --git a/nvm.sh b/nvm.sh
index 609474d..cc3f4d2 100644
--- a/nvm.sh
+++ b/nvm.sh
@@ -251,6 +251,8 @@
       FORMAT='\033[0;32m-> %9s\033[0m'
     elif [ -d "$NVM_DIR/$VERSION" ]; then
       FORMAT='\033[0;34m%12s\033[0m'
+    elif [ "$VERSION" = "system" ]; then
+      FORMAT='\033[0;33m%12s\033[0m'
     else
       FORMAT='%12s'
     fi