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/driver-model/overview.txt b/Documentation/driver-model/overview.txt
index 2050c9f..07236ed 100644
--- a/Documentation/driver-model/overview.txt
+++ b/Documentation/driver-model/overview.txt
@@ -57,7 +57,7 @@
 
 The PCI bus layer freely accesses the fields of struct device. It knows about
 the structure of struct pci_dev, and it should know the structure of struct
-device. Individual PCI device drivers that have been converted the the current
+device. Individual PCI device drivers that have been converted to the current
 driver model generally do not and should not touch the fields of struct device,
 unless there is a strong compelling reason to do so.