The link in the "Error variable naming" section seems to directly contradict what the section says.

The link (https://go.dev/talks/2014/names.slide#14) says:

  Error values should be of the form ErrFoo:
  
  var ErrFormat = errors.New("image: unknown format")

But the page says:

  // But if you want to give it a longer name, use "somethingError".
  var specificError error
  result, specificError = doSpecificThing()

And also says:

  Don't do this:
  [...]
  var errSpecific error
  result, errSpecific = doSpecificThing()

So should error variables written like `errSpecific` or `specificError`? The go wiki says they should be written starting with `err`: https://go.dev/wiki/Errors#naming