Moved operations in smaller scope, so that they run only when necessary.
This improves performance in some situations, when adjusting indentation
during save action.

E.g. for 16k commented lines, indentation takes 1/3 of the original time
(40 seconds, down from 120 seconds).

Change-Id: I3a21fa5f007b08bf492e906d460eeabdd5b92ce0
Signed-off-by: Simeon Andreev <simeon.danailov.andreev@gmail.com>