change docstring

src/DataWrangling/DataWrangling.jl

@@ -58,8 +58,10 @@ end
 
 Create a downloader that uses a netrc file to authenticate with the given machine.
 This downlader writes the username and password in a file named `auth.netrc` (for Unix) and 
-`auth_netrc` (for Windows), located in the directory `dir`. To avoid storing passwords in plain text,
-it is recommended to initialize the downloader in a temporary directory.
+`auth_netrc` (for Windows), located in the directory `dir`. 
+To avoid leaving the password on disk after the downloader has been used,
+it is recommended to initialize the downloader in a temporary directory, which will be removed
+after the download is complete.
 
 For example: