Git core.autocrlf, text=auto and --renormalize

Git will normalize line endigs for files which are added to the index if core.autocrlf is set to true or input (use text=auto in .gitattributes to autodetect text files). However, it won’t do this for files which already exist in the repo. For those it remembers (where?) how they were treated when they were first added. So after changing .gitattributes you have to invoke git add --renormalize . to re-inspect all tracked files and normalize them if necessary.