Issue #18192: Introduce importlib.util.MAGIC_NUMBER and document the
deprecation of imp.get_magic().
diff --git a/Lib/importlib/util.py b/Lib/importlib/util.py
index 9cf0eb7..09ec03c 100644
--- a/Lib/importlib/util.py
+++ b/Lib/importlib/util.py
@@ -1,5 +1,6 @@
 """Utility code for constructing importers, etc."""
 
+from ._bootstrap import MAGIC_NUMBER
 from ._bootstrap import module_to_load
 from ._bootstrap import set_loader
 from ._bootstrap import set_package