Use environment variables instead of command line arguments for merged doctests Fixes [#130796](https://github.com/rust-lang/rust/issues/130796). Before merging this one, let's first ensure it has a smaller impact compared to command line arguments (results can be seen [here](https://github.com/rust-lang/rust/pull/130285)). I'll start a crater run once CI passed. cc ``@ehuss`` r? ``@notriddle`` |
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| make.rs | ||
| markdown.rs | ||
| runner.rs | ||
| rust.rs | ||
| tests.rs | ||