Shorten default description of like/unlike
Shorten default description of like/unlike

This amends recent addition[^1] of default descriptions to like/unlike
to remove the `$got` text, as it can be a huge chunk of text, making
description a mile long.

[1] https://github.com/rakudo/rakudo/commit/4b915f7f3faaed11d48393db129

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