[PATCH v2 04/12] c-user: Clarify IO manager documentation

[Sebastian Huber]

Unify the wording across similar directives of other managers.

Update #3993.
---
 c-user/io/directives.rst | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/c-user/io/directives.rst b/c-user/io/directives.rst
index a6cd755..0683c4c 100644
--- a/c-user/io/directives.rst
+++ b/c-user/io/directives.rst
@@ -64,9 +64,9 @@ table and device major number in the Device Driver Table.
     This parameter is the device driver address table.
 
 ``registered_major``
-    This parameter is the pointer to a device major number variable.  The
-    device major number of the registered device will be stored in this
-    variable, in case of a successful operation.
+    This parameter is the pointer to a device major number variable.  When the
+    directive call is successful, the device major number of the registered
+    device will be stored in this variable.
 
 .. rubric:: RETURN VALUES:
 
-- 
2.26.2