message-format=short output is unnecessarily hard to read

[fintelia]

The --message-format=short option is a very convenient way to get a condensed error output from cargo when the same/similar errors occur at many places in a code base. Unfortunately, the current output with this option uses bold/color to place the emphasis on the wrong parts of each output line, making it harder to read.

For instance, consider the screenshot below. The same "trait objects without an explicit `dyn` are deprecated" is repeated constantly, yet is bold every single time. By contrast the unique parts of each line -- the filename and line/column numbers -- are the only things that aren't bold.