…dd known failures (gitpatch-rs#10)

* add another sample

* parse_samples: parameterize test code prior to adding failing test

* tests: add wild-samples-fail directory for work in progress

with merge-conflict example

* tests: add wild-samples of submodule diffs

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Co-authored-by: Wolf Vollprecht <w.vollprecht@gmail.com>

* clippy: remove useless_vec

This currently breaks CI in e.g. https://github.com/gitpatch-rs/gitpatch/actions/runs/20013661647/job/57387162629#step:5:70

* Don't error on empty input

Fixes gitpatch-rs#13

* Simplify the check that multiple_patches consumes the whole file

This currently breaks CI in e.g. https://github.com/gitpatch-rs/gitpatch/actions/runs/20013661647/job/57387162629#step:5:70

* Update to actions/checkout@v6

* Use dtolnay/rust-toolchain instead of deprecated actions-rs

* Fold style checks into the same workers

* Remove use of deprecated actions-rs

* Just build once, including the examples

* Also test on nightly

* Edition 2021: Supported by every toolchain that we support, and doesn't actually require any changes to the codebase.

* Declare MSRV 1.71, and test it: Seems to be the earliest version that actually builds.

Fixes gitpatch-rs#4

Co-authored-by: Vinícius Miguel <36349314+vrmiguel@users.noreply.github.com>
Co-authored-by: vrmiguel <lemao.vrm07@hotmail.com>