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>
		
	
					 | 
			||
|---|---|---|
| .. | ||
| binding.txt | ||
| bus.txt | ||
| class.txt | ||
| device.txt | ||
| driver.txt | ||
| interface.txt | ||
| overview.txt | ||
| platform.txt | ||
| porting.txt | ||