Currently if a blank line is followed by a comment the 'last_non_comment_spaces'
variable gets reset, which results in the comment line not being indented.
This just ignores blank lines so that 'last_non_comment_spaces' isn't reset
and the comment line is properly indented.
Closes-Bug: 1779191
Change-Id: I286da578c42df24242ba38df12d42c8a8fdd4a4f