post_class for public custom taxonomies

[sillybean]

post_class() should include styles for custom taxonomies.

[nacin]

Nice enhancement. Can probably clean up the existing taxonomy code there in the process.

[nacin]

Going to leave the needs-patch on there. Let's reduce the code a bit.

We also need to check that we're hitting the cache on that.

[sillybean]

I thought so too, but it would change existing behavior, since tags print tag-name now and this would print post_tag-name. Could throw in an if just for tags, I guess.

[nacin]

Indeed.

[sillybean]

Patch updated. This replaces the existing bits for categories and tags in a way that's consistent with the old behavior.

Not sure about the cache; this is more or less how it was done before.

[sillybean]

Adds post classes for public custom taxonomies

[sillybean]

Finally found a moment to go through all the relevant functions, and it looks like they are hitting the cache whenever possible.

[sillybean]

Adds post classes for public custom taxonomies

[sillybean]

Patch cleaned up and updated.

[sillybean]

Refreshed patch and cleaned up a taxonomy name/object error.

[boonebgorges]

Following up: cache support looks good (demonstrated a unit test, coming up).

[boonebgorges]

In 31271:

Add classes for custom taxonomy terms in get_post_class().

Props sillybean.
Fixes #16223.