At the moment, Compiler.java rewrites the location of an error (elision of the absolute file path), while leaving the location of a compiler warning in its raw form.

Would be nice to have all the paths elided, no?

screen shot 2018年05月01日 at 8 02 42 pm

Doing this would also simplify the task of jumping to warning locations from the console, as has been requested in #3383