Don't deprecate Attr.Data

[johannesegger]

The html attribute data seems to be deprecated, but I still use it for showing e.g. a pdf:

<object data="path/to/file.pdf" />

[Tarmil]

Indeed I am not quite sure why it is in Deprecated. This module is for attributes that are deprecated by the HTML5 standard, but after looking up, data doesn't seem to be one of them. Unfortunately we can't move it to the Attr module, since there is already a Data function there which is used to create data-foo attributes. Not to worry though, even though the module is called Deprecated it is not planned for deletion at any point in the future.

[johannesegger]

I see, then it's not a problem, thanks for clarification.