How to "save with encoding"
Recently there is a plugin written for this: Convert-file-encoding
To use the plugin, press Ctrl+Shift+P, type Convert File Encoding
to search for the function and select the encoding you want the file convert into.
Another option, without using any plugin: cut all text from file, then switch to the target encoding (Ctrl-Shift-U
) in an empty editor and paste the text back.
As seen in https://github.com/atom/encoding-selector/issues/7#issuecomment-274257654