Correct indentation on file reference/datetime/datetimeinterface.xml

[Marqitos]

#4453 - Correct indentation on file reference/datetime/datetimeinterface.xml
From lines 356 - 390

[kamil-tekiela]

You're correct, but is there a reason why you picked these files and only made this change? There are hundreds of files with wrong indentation and changing them all without reason is probably too much churn.

[Marqitos]

Sorry if this is not correct.
I am updating the translation of the documentation into Spanish.
And when I translate a file that has the wrong indentation, at the same time that I put it correctly in the Spanish documentation, I modify the original file, so that it is correct.

I thought it was going to be a one-time file, so I committed one file at a time.
Now I have a few that I've fixed, so I'll commit when I have the whole folder, for example.