Unexpected result appending a slice to a slice of slices

[jmooring]

{{ $obj := slice (slice "a") }}
{{ $obj = $obj | append (slice "b") }}
{{ $obj = $obj | append (slice "c") }}

<pre>
{{ jsonify (dict "indent" "  ") $obj }}
</pre>

Actual:

[
  [
    "a"
  ],
  "b",    <-- ???
  [
    "c"
  ]
]

Expected:

[
  [
    "a"
  ],
  [
    "b"
  ],
  [
    "c"
  ]
]

This isn’t new behavior (for example, reproduced with v0.76.0).

Not sure if this append issue is related: #10458.

Reference: https://discourse.gohugo.io/t/44501

[jmooring]

Fixed with cefe74d.

[github-actions]

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