Issue #26778: Fixed "a/an/and" typos in code comment and documentation.
diff --git a/Modules/faulthandler.c b/Modules/faulthandler.c
index 9485e24..f1fda48 100644
--- a/Modules/faulthandler.c
+++ b/Modules/faulthandler.c
@@ -1051,7 +1051,7 @@
{"register",
(PyCFunction)faulthandler_register_py, METH_VARARGS|METH_KEYWORDS,
PyDoc_STR("register(signum, file=sys.stderr, all_threads=True, chain=False): "
- "register an handler for the signal 'signum': dump the "
+ "register a handler for the signal 'signum': dump the "
"traceback of the current thread, or of all threads if "
"all_threads is True, into file")},
{"unregister",