Twenty Eleven: use new URL extraction function for ephemera widget

[lancewillett]

The goal is to replace the URL grabber in Twenty Eleven with the new core version while ensuring back compat.

See #23570 for the suggested new functions.

[nacin]

Seems like [23474] was in reference to this ticket? I opened #23674, and don't think it should be pluggable.

[lancewillett]

Replying to nacin:

Seems like [23474] was in reference to this ticket? I opened #23674, and don't think it should be pluggable.

Not related.

Obenland and I were auditing all functions in Twenty Thirteen and I looked back at the other themes as saw this was the only non-pluggable function, and fixed it -- your thoughts one #23674 make sense, though.

[lancewillett]

In 23792:

Twenty Eleven: use new URL extraction function, get_the_url() for link post formats in the Ephemera widget. Props obenland, fixes #23618.

[lancewillett]

Now that the_post_format_* functions are removed from core, Twenty Eleven should use get_content_url instead in the twentyeleven_get_first_url() function.

See also #24469.

[lancewillett]

In 24434:

Twenty Eleven: use get_content_url() instead of get_the_post_format_url(). Fixes #23618.