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This PR changes `$env` to be **case-preserving** instead of case-sensitive. That is, it preserves the case of the environment variable when it is first assigned, but subsequent retrieval and update ignores the case. Notably, both `$env.PATH` and `$env.Path` can now be used to read or set the environment variable, but child processes will always see the correct case based on the platform. Fixes #11268. --- This feature was surprising simple to implement, because most of the infrastructure to support case-insensitive cell path access already exists. The `get` command extracts data using a cell path in a case-insensitive way (!), but accepts a `--sensitive` flag. (I think this should be flipped around?) |
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