[PATCH rtems-docs] eng: show how to set local default subject-prefix

[Gedare Bloom]

---
 eng/vc-users.rst | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/eng/vc-users.rst b/eng/vc-users.rst
index 64c2624..680c004 100644
--- a/eng/vc-users.rst
+++ b/eng/vc-users.rst
@@ -466,6 +466,11 @@ the rtems-docs repo, use
 
   git format-patch --subject-prefix="PATCH rtems-docs" ...
 
+You can set a default subject prefix for each repository locally, for example:
+
+.. code-block:: shell
+  git config format.subjectprefix "PATCH rtems-docs"
+
 Patches created using ``git format-patch`` are formatted so they can be emailed
 and rely on having Git configured with your name and email address, for example
 
-- 
2.34.1