Transform a file an give customized message

Wraps utf8::transform_lines_enc() and gives customized messages.

transform_file(path, fun, verbose = FALSE, max_char_path,
  message_before = "", message_after = " [DONE]",
  message_after_if_changed = " *", ...)

Arguments

path	A vector of file paths.
fun	A function that returns a character vector.
verbose	Should the function show a message with a list of changed files?
max_char_path	The number of characters of the longest path. Determines the indention level of message_after.
message_before	The message to print before the path.
message_after	The message to print after the path.
message_after_if_changed	The message to print after message_after if any file was transformed.
...	Further arguments passed to utf8::transform_lines_enc().