# comment-1

# comment-2
# comment-3
0
# comment-4

# comment-5
# redundant empty lines should be collapsed


# comment-6
1 # comment-7



100     # comment-8

# spaces only
    

# comment with trailing space  

=begin
block
comment
here
=end

if true
  1
=begin
  abc
=end
a
end

# comment-9