Documentation: remove duplicated words

Remove many duplicated words under Documentation/ and do other small
cleanups.

Examples:
        "and and" --> "and"
        "in in" --> "in"
        "the the" --> "the"
        "the the" --> "to the"
        ...

Signed-off-by: Paolo Ornati <ornati@fastwebnet.it>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
diff --git a/Documentation/sound/oss/vwsnd b/Documentation/sound/oss/vwsnd
index a6ea0a1..4c6cbdb 100644
--- a/Documentation/sound/oss/vwsnd
+++ b/Documentation/sound/oss/vwsnd
@@ -12,7 +12,7 @@
 
 The Visual Workstation has an Analog Devices AD1843 "SoundComm" audio
 codec chip.  The AD1843 is accessed through the Cobalt I/O ASIC, also
-known as Lithium.  This driver programs both both chips.
+known as Lithium.  This driver programs both chips.
 
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