Non-functional whitespace was intentionally added toremoved from the SDK Dockerfiles to cause them to have a new git commit. This is to workaround the pipeline image caching logic. For this release we want to reuse all existing images except for the SDK, without rebuilding them. So we want caching to be enabled but we need to cause the SDK Dockerfiles to be rebuilt. This is done by having them be associated with a new git commit, causing a cache miss and rebuilding the Dockerfiles.
Release issue: https://github.com/dotnet/release/issues/540