Port to Coq #12512.

See merge request iris/iris!465

Add natural numbers with min RA

Closes #324

See merge request iris/iris!461

Add IdempP instances for min_nat and max_nat.

Move additional numbers related lemmas and instances into the numbers file.

Use [fill K] in tac_wp_pure

See merge request iris/iris!463

This is more consistent with other tac_wp tactics for HeapLang and also
a tiny bit more efficient, which is good to embody in the basic tactics
so derived code follows the same patterns.

Fix error message when with [% //] fails

Closes #325

See merge request iris/iris!460

Fixes #325.

Also added a tests for the various `iSpecialize` error cases involving
the `[%]` and `[//]` specialization patterns.

Factor out lemma `löb_weak`.

See merge request iris/iris!459

Change ascii turnstile

See merge request iris/iris!435

Gregory Malecha authored 4 years ago and Robbert Krebbers committed 4 years ago

- it doesn't seem to conflict with anything in Ltac

Fix `forall` parsing.

See merge request iris/iris!432