Keep lines between the anchor comments specified as-is.
For any lines not between the anchors, include them but use # at the beginning. This will
hide the lines from initial display but include them when expanding the code snippet or testing
with rustdoc.
Keep lines contained within the range specified as-is.
For any lines not in the range, include them but use # at the beginning. This will hide the
lines from initial display but include them when expanding the code snippet or testing with
rustdoc.