fixup! feat(core.utils): ruff format the added docstring example

Author: cpcloud

cuda_core/cuda/core/utils/_program_cache.py

@@ -516,13 +516,11 @@ def make_program_cache_key(
         from cuda.core import Program, ProgramOptions
         from cuda.core.utils import FileStreamProgramCache, make_program_cache_key
 
-        source = "extern \"C\" __global__ void k(int *a){ *a = 1; }"
+        source = 'extern "C" __global__ void k(int *a){ *a = 1; }'
         options = ProgramOptions(arch="sm_80")
 
         with FileStreamProgramCache("/var/cache/myapp/cuda") as cache:
-            key = make_program_cache_key(
-                code=source, code_type="c++", options=options, target_type="cubin"
-            )
+            key = make_program_cache_key(code=source, code_type="c++", options=options, target_type="cubin")
             obj = cache.get(key)
             if obj is None:
                 obj = Program(source, "c++", options=options).compile("cubin")