* added cargo xtask msrv X.Y placeholder function * add placeholder function cargo xtask msrv (X.Y) * implement CLI arg vec, graceful errors, formatting * impl. xtask msrv insert,upsert,graceful failures * misc fixes - still need to update write method * interim commit before removing comments * updated per @djmitche suggestions. 2 fixes todo * impl unwrap error checks, file truncating, etc * removed test paths * updated toml with specific regex version * updated cargo toml and lock for regex version * updated cargo toml and lock for regex version * fixed clippy complaints * impl replace file content, not comments * accept djmitche suggestion to change comment documentation Co-authored-by: Dustin J. Mitchell <dustin@v.igoro.us> * refactored, need to fix Cow return * removed debug prints, unncessary if, etc. * fix non-idiomatic rust, arg.len error handling * add #MSRV to config files and test --------- Co-authored-by: iwyatt <sayhello+git@isaacwyatt.com> Co-authored-by: Dustin J. Mitchell <dustin@v.igoro.us>
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