Fix message construction

app.py

@@ -37,13 +37,13 @@ def get_clusters_plot(n_blobs, quantile, cluster_std):
     if len(centers) != n_clusters_:
         message = (
             f"The number of estimated clusters {n_clusters_}"
-            " differs from the true number of clusters. ({n_blobs}).",
-            "\n Try changing the bandwidth parameter.",
+            + f" differs from the true number of clusters. ({n_blobs})."
+            + " Try changing the bandwidth parameter."
         )
     else:
         message = (
             f"The number of estimated clusters {n_clusters_}"
-            "matches the true number of clusters. ({n_blobs})!",
+            + f" matches the true number of clusters. ({n_blobs})!"
         )
     return fig, message