On the Commits page [https://chromiumdash.appspot.com/commits], it would be great to be able to search by username fragments -- at least, by "user:isherman" rather than "user:isherman@chromium.org".

(Relatedly, it would be great to have some example queries or autocomplete or something along those lines to guide users. I figured out the syntax because I tried searching for "isherman", and got an error message. Can we show the contents of that error message before the user tries something and it fails? O:-])