add reference id to test, and fix filename

[tshepang]

Noticed the filename is wrong, then took advantage of being there by adding Reference id

[rustbot]

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[compiler-errors]

please squash this into one commit; there's no need to make this two commits if they're both just tiny tweaks.

[compiler-errors]

@rustbot author

[compiler-errors]

Also please adjust the description and PR title to actually reflect what this PR does. I think out of the rename and adding a reference ID, the latter is actually the more important part of this PR, so it would be nice if that had been mentioned.

Because right now the title is very vague.

[tshepang]

squashed, though I thought the changes were distinct enough to deserve separate commits