Align docs

Signed-off-by: Madhura Jayaratne <madhura.cj@gmail.com>
Remove extra variables form doc

Signed-off-by: Madhura Jayaratne <madhura.cj@gmail.com>
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Signed-off-by: Madhura Jayaratne <madhura.cj@gmail.com>
Add spaces around concat

Signed-off-by: Madhura Jayaratne <madhura.cj@gmail.com>