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2f2e5d80a2
There was already a code path to handle siblings, but this only applied if the boundary child at the range's start/end (often a text leaf) was a sibling of aContainer. It didn't apply if aContainer was a direct sibling of the range's start/end container. To fix this, don't restrict the code which handles the case where aContainer does not contain the start/end boundary. This should always fail to crop, regardless of the ancestry. Differential Revision: https://phabricator.services.mozilla.com/D139351
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