Spring Replace double spaces with single spaces in code and comments in spring-webmvc

Except for meaningful double spaces (e.g. to align the indentation of comments), I replaced all meaningless double spaces with single spaces in webmvc module.

Comment From: sbrannen

This has been merged into main in 3d0f55273cf94f38735d818229a06d187b5af430 and revised in d30ad794ab5b9e87b3d2cbabfe521c22d4aa47e0.

Thanks