helix/runtime/queries/cylc/indents.scm

[
  (top_section)
  (sub_section_1)
  (sub_section_2)
  (graph_section)
  (runtime_section)
  (task_section)
] @indent

[
  (top_section)
  (sub_section_1)
  (sub_section_2)
  (graph_section)
  (runtime_section)
  (task_section)
] @extend

(line_continuation) @indent.always