chore: tighten up the message code

Author: cpcloud

numba_cuda/numba/cuda/core/untyped_passes.py

@@ -65,12 +65,9 @@ def fallback_context(state, msg):
             # this emits a warning containing the error message body in the
             # case of fallback from npm to objmode
             loop_lift = "" if state.flags.enable_looplift else "OUT"
-            msg_rewrite = (
-                "\nCompilation is falling back to object mode "
-                "WITH%s looplifting enabled because %s" % (loop_lift, msg)
-            )
             warnings.warn_explicit(
-                "%s due to: %s" % (msg_rewrite, e),
+                "Compilation is falling back to object mode "
+                f"WITH{loop_lift} looplifting enabled because {msg} due to: {e}",
                 errors.NumbaWarning,
                 state.func_id.filename,
                 state.func_id.firstlineno,