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/networking/bonding.txt b/Documentation/networking/bonding.txt
index dc942ea..de809e5 100644
--- a/Documentation/networking/bonding.txt
+++ b/Documentation/networking/bonding.txt
@@ -1023,7 +1023,7 @@
 files located in /sys/class/net/<bond name>/bonding
 
 	The names of these files correspond directly with the command-
-line parameters described elsewhere in in this file, and, with the
+line parameters described elsewhere in this file, and, with the
 exception of arp_ip_target, they accept the same values.  To see the
 current setting, simply cat the appropriate file.