This test case arose in Iron.

Also, rewrite `iIntoEmpValid`. Now, instead of using Ltac to traverse
the type of the term and generate goals for the premises, we repeatedly
apply a series of lemmas. This has the advantage that it works up to
convertability, and we no longer need the `eval ...` hacks.

To prepare for https://github.com/coq/coq/pull/10762

Remove space before `;;` in format directive.

See merge request !336

The space should not be there and was added in oversight. This also provides
forwards compatibility with https://github.com/coq/coq/pull/10832.

CAS -> CmpXchg in HeapLang tactic docs

See merge request !334

Fix issue pointed out by @tchajed in iris/iris!330 (comment 41322)

Test for !331 and hint for `bi_emp_valid`

See merge request iris/iris!333

Add missing `iSplit` hint for `∗-∗`

See merge request iris/iris!331

This reverts commit bc8e2d15.
We already ignore those in the tex folders. We don't want global ignores for them.

Set `Hint Mode` for `inG`.

See merge request iris/iris!330

Lang lemmas

See merge request iris/iris!324

There is no need to include the `(∃ P', □ ▷ (P  P')  ...` since we
get closure under `▷ □ ` from regular invariants.

Added a stronger version of cinv_open_strong

See merge request iris/iris!326