Fix flake8

Author: gmarkall

numba_cuda/numba/cuda/tests/cudapy/test_debuginfo.py

@@ -92,9 +92,10 @@ def f(cond):
 
     def test_bool_type(self):
         sig = (types.int32, types.int32)
+
         @cuda.jit("void(int32, int32)", debug=True, opt=False)
         def f(x, y):
-            z = x == y
+            z = x == y  # noqa: F841
 
         llvm_ir = f.inspect_llvm(sig)
 
@@ -105,7 +106,7 @@ def f(x, y):
         mdnode_id = match.group(1)
 
         # verify the DIBasicType has correct encoding attribute DW_ATE_boolean
-        pat = f'!{mdnode_id}\s+=\s+!DIBasicType\(.*DW_ATE_boolean'
+        pat = rf'!{mdnode_id}\s+=\s+!DIBasicType\(.*DW_ATE_boolean'
         match = re.compile(pat).search(llvm_ir)
         self.assertIsNotNone(match, msg=llvm_ir)