There is overlap. I once lost a fair amount of time because some dimwit predecessor thought putting anything other than a space after commas was acceptable. (It sounds ridiculous but it's true. I can explain if you care.)

So: a formatter will, for example, make sure your lines are indented to some standard amount of indentation, a linter will bitch if they are not, and both the formatter and the linter should DTRT when they identify certain indefensible coding practices.