Update triton_patch/custom_cache_manager.py

Co-authored-by: Nick Hill <nickhill@us.ibm.com>
Signed-off-by: Joe Runde <joe@joerun.de>

triton_patch/custom_cache_manager.py

@@ -21,7 +21,7 @@ def __init__(self, key, override=False, dump=False):
             # create cache directory if it doesn't exist
             self.cache_dir = os.getenv("TRITON_CACHE_DIR",
                                        "").strip() or default_cache_dir()
-            self.cache_dir = self.cache_dir + "_" + str(os.getpid())
+            self.cache_dir = f"{self.cache_dir}_{os.getpid()}"
             print(f"{self.cache_dir=}")
             if self.cache_dir:
                 self.cache_dir = os.path.join(self.cache_dir, self.key)