Feature description
A separate command for ecformat, maybe called validate, that only checks that the values of the properties in all .editorconfig files are correct. For example that indent_style is tab or space not something else. Maybe the handling of spelling_language from #8 could also move to this command. The command line switches could be identically or at least similar to check and fix. However, one edge for the targets could be worth to consider differently. If a .editorconfig file is directly one of the target, should it be only validated directly or also all other .editorconfig files that may apply to it?
Benefits
This would allow also check (separately) that .editorconfig files themselves contains no error. This would for example enable to use ecformat for a respective separate pre-commit hook for changes to these files.