For example, a recent run output this at the top of my source:
./erlfmt.zz1ooS:39: replacing call to `lists:map/2' with a list comprehension.
./erlfmt.zz1ooS:39: changing application of fun-expression to local function call.
This reformatting happened again to me recently, and I liked the change. Just had to rename the generic names that erl_tidy came up with, but it improved the code.
For example, a recent run output this at the top of my source:
Shut these off.