When the reformatted code doesn't contain the same quantity of comments
as the original code, use the original code instead of the reformatted
code.
This is done for all expressions and `let` statements.
This should be used at the finest grained level possible, to avoid that
a small disappearing comment prevents a big chunk of code to be
reformatted.
Kind of fixes (avoid disappearing comments, but prevents a good
formatting is such case) #285#225#563#743
