I just wish sometimes they were more configurable. For example, the Elixir formatter is quite opinionated on things but is generally not configurable.
For example, if I use the pipe example on Elixir's landing page and add comments to it (obviously a contrived example):
"Elixir" # string to get frequencies for
|> String.graphemes() # Get all graphemes (i.e., character units)
|> Enum.frequencies() # Get the number of occurrences of each grapheme
# string to get frequencies for
"Elixir"
# Get all graphemes (i.e., character units)
|> String.graphemes()
# Get the number of occurrences of each grapheme
|> Enum.frequencies()