lix/tests/functional2/repl_characterization/repl_basics/idempotent.md

A previously unforced thunk is an attribute set does not lead to indentation when it won't evalutate to a neted structure:

:p let x = 1 + 2; in [ { inherit x; } { inherit x; } ]

[
  { x = 3; }
  { x = 3; }
]

Same for a list:

:p let x = 1 + 2; in [ [ x ] [ x ]]

[
  [ 3 ]
  [ 3 ]
]