1. Summary

It would be nice if Autotyping will have the --dry-run mode.

2. Example of desired behavior

1. Autotyping will have the command-line argument named like --diff or --dry-run or --preview. If this argument enabled, Autotyping will output to console proposed changes instead of modifying files in-place.
2. If Autotyping proposes one or more changes, the command exits with non-zero exit code. This is helpful when using Autotyping in Continuous Integration or in pre-commit hooks.

3. Justification of the need of the feature

1. Checking behavior. Modifying results may be strange or non-expected for users especially if they use such an option as --aggressive. Previewing is useful for understanding how a program works.
2. Detecting problems. 100% safe file modifiers isn’t existing. I prefer to preview a behavior of all programs (especially new for me) that modify my sources to prevent possible problems.

Thanks.