Closes #14250: regex.flags has not only explicit flags but also implicit flags and those from the pattern
diff --git a/Doc/library/re.rst b/Doc/library/re.rst
index 0e4acd8..b4e0557 100644
--- a/Doc/library/re.rst
+++ b/Doc/library/re.rst
@@ -784,8 +784,9 @@
.. attribute:: regex.flags
- The flags argument used when the RE object was compiled, or ``0`` if no flags
- were provided.
+ The regex matching flags. This is a combination of the flags given to
+ :func:`.compile`, any ``(?...)`` inline flags in the pattern, and implicit
+ flags such as :data:`UNICODE` if the pattern is a Unicode string.
.. attribute:: regex.groups