section: invalid
not_a_valid_section
[missing_square_bracket
missing_square_bracket]
[]
[ ]
  [indented_section]
           [indented_section]  # comment
       [indented_section]  ; comment
;[commented_section]
#[another_commented_section]
; [commented_section]
# [another_commented_section]
this_is_an_option: 123
  this_is_an_indented_option: 123
this_is_an_option_block_start:

#
;
