[PATCH] Documentation: Fix duplicated words

[Wang Zihan]

Remove duplicated words in three documentation files:
- "in in" -> "in" (switchdev.rst)
- "The the" -> "The" (dmx-reqbufs.rst)
- "on on" -> "on" (user_mode_linux_howto_v2.rst)

Signed-off-by: Wang Zihan <3772548978 at qq.com>
---
 Documentation/networking/switchdev.rst                | 2 +-
 Documentation/userspace-api/media/dvb/dmx-reqbufs.rst | 2 +-
 Documentation/virt/uml/user_mode_linux_howto_v2.rst   | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/Documentation/networking/switchdev.rst b/Documentation/networking/switchdev.rst
index 2966b7122..948bce44c 100644
--- a/Documentation/networking/switchdev.rst
+++ b/Documentation/networking/switchdev.rst
@@ -162,7 +162,7 @@ The switchdev driver can know a particular port's position in the topology by
 monitoring NETDEV_CHANGEUPPER notifications.  For example, a port moved into a
 bond will see its upper master change.  If that bond is moved into a bridge,
 the bond's upper master will change.  And so on.  The driver will track such
-movements to know what position a port is in in the overall topology by
+movements to know what position a port is in the overall topology by
 registering for netdevice events and acting on NETDEV_CHANGEUPPER.
 
 L2 Forwarding Offload
diff --git a/Documentation/userspace-api/media/dvb/dmx-reqbufs.rst b/Documentation/userspace-api/media/dvb/dmx-reqbufs.rst
index d2bb1909e..18810f0bb 100644
--- a/Documentation/userspace-api/media/dvb/dmx-reqbufs.rst
+++ b/Documentation/userspace-api/media/dvb/dmx-reqbufs.rst
@@ -72,4 +72,4 @@ appropriately. The generic error codes are described at the
 :ref:`Generic Error Codes <gen-errors>` chapter.
 
 EOPNOTSUPP
-    The  the requested I/O method is not supported.
+    The requested I/O method is not supported.
diff --git a/Documentation/virt/uml/user_mode_linux_howto_v2.rst b/Documentation/virt/uml/user_mode_linux_howto_v2.rst
index c37e8e594..7b08738c3 100644
--- a/Documentation/virt/uml/user_mode_linux_howto_v2.rst
+++ b/Documentation/virt/uml/user_mode_linux_howto_v2.rst
@@ -1092,7 +1092,7 @@ be formatted as plain text.
 
 Developing always goes hand in hand with debugging. First of all,
 you can always run UML under gdb and there will be a whole section
-later on on how to do that. That, however, is not the only way to
+later on how to do that. That, however, is not the only way to
 debug a Linux kernel. Quite often adding tracing statements and/or
 using UML specific approaches such as ptracing the UML kernel process
 are significantly more informative.
-- 
2.54.0