Empty Strings inside t function causes a false info of Added keys.

[christian1koch]

🐛 Bug Report

When you use the t function inside an empty string, and then extract the keys, you get the information "Added keys: 1". But in reality nothing is added, causing then failOnUpdates always to fail. This can be troublesome if you use failOnUpdates for testing purposes, and then having it fail without knowing why is there a key being added but doesn't get actually added.

To Reproduce

add an empty string to the t function = t("");

Expected behavior

It should either add the empty string to the file, or not say "Added keys: 1" when doing the extraction of keys.