message: Drop an old visible doc TODO
  Looks like this originates from
  But it's even visible in the render docs:
  O
diff: @@ -578,7 +578,6 @@ When `default-members` is not specified, the default is the root manifest
  if it is a package, or every member manifest (as if `--all` were specified
  on the command-line) for virtual workspaces.
  -#TODO: move this to a more appropriate place
  ### The project layout
  If your project is an executable, name the main source file `src/main.rs`. If it
  