The bug

The datapackFailure.title line in the en_us.json language file has double spaces between the translation string and the equivalent text.

This does not prevent the translation string from working normally in the game although it is a small error nonetheless. The rest of the lines in the language file are not affected.

Here is a part of the language file that demonstrates the bug:

{
  "datapackFailure.title":  "Errors in currently selected datapacks prevented the world from loading.\nYou can either try to load it with only the vanilla data pack (\"safe mode\"), or go back to the title screen and fix it manually."
}