Thanks for the PR. Please clean up unused spaces and use the code style already used in the project (e.g. { on new lines) and remove the editorconfig (we use VS defaults).

@erichiller @RicoSuter are there any updates with this PR?
I faced the same issue with the non-working <inheritdoc> tag when it contains cref inside.

In order to merge this PR:

• Please add unit tests for the new functionality
• Please revert the code style changes and editorconfig
• Fix conflicts

Thanks for the contribution! However, the functionality in this PR has since been independently implemented on master:

• inheritdoc cref= support and making GetXmlDocsPath public: inheritdoc cref support #109 (merged Jan 2022)
• Null-safety improvements on DeclaringType: Ignore inheritdoc on namespace base class #156 (merged Nov 2024)

Since all the key changes are already covered, I'm going to close this PR.