This lemma allows one to get the witness out of a later, without having
to use `later_car`, i.e. in a way that works in the on-paper version of
the logic.

Thanks to @Blaisorblade for reporting.

Thanks @jtassaro.

link to coqdoc

See merge request FP/iris-coq!192

Explicitly use core hint database

See merge request FP/iris-coq!191

Adding a hint without a database now triggers a deprecation warning in
Coq master (https://github.com/coq/coq/pull/8987).

This closes issue #220.

Link to HTML sources for easier navigation

See merge request FP/iris-coq!190

After Coq PR #7825 this will create unwanted evars.

Update the link to std++

See merge request FP/iris-coq!189

Add `big_opM_union` and `big_sepM_union`.

See merge request FP/iris-coq!188