add new line in log (pytorch#164240)

Pull Request resolved: pytorch#164240
Approved by: https://github.com/ColinPeppler, https://github.com/Skylion007, https://github.com/ezyang
ghstack dependencies: pytorch#164075

Author: laithsakka

torch/fx/experimental/symbolic_shapes.py

@@ -6612,13 +6612,13 @@ def _make_data_dependent_error(
             desc = "Could not guard on data-dependent expression"
             size_oblivious_result_msg = (
                 "consider using data-dependent friendly APIs such as "
-                "guard_or_false, guard_or_true and statically_known_true"
+                "guard_or_false, guard_or_true and statically_known_true."
             )
 
         msg = (
             f"{desc} {expr} (unhinted: {unhinted_expr}).  "
             f"(Size-like symbols: {', '.join(map(str, size_like_symbols)) or 'none'})\n\n"
-            f"{size_oblivious_result_msg}"
+            f"{size_oblivious_result_msg}\n"
             f"Caused by: {sloc}\n"
             'For more information, run with TORCH_LOGS="dynamic"\n'
             "For extended logs when we create symbols, also add "