[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

thunder/examine/memory_calculation.py

@@ -191,8 +191,8 @@ def get_alloc_memory(trc: TraceCtx, *, annotate=False) -> tuple[int, dict[str, i
         allocated += impl(bsym, tensor_to_memory_data, name_to_alloc_memory)
         if annotate:
             if bsym.header:
-                bsym.header += ' '
-            bsym.header += f'mem after next op: ~{allocated/(2**30):2f}GB'
+                bsym.header += " "
+            bsym.header += f"mem after next op: ~{allocated/(2**30):2f}GB"
         max_allocated = max(max_allocated, allocated)
 
     return max_allocated, name_to_alloc_memory