Change if keyword to assert

[dandclark]

Change if keyword to assert in README and spec.
Add [no LineTerminator here] prior to AssertClause.

[xtuc]

Thanks

[littledan]

This change LGTM if we want to rename if to assert. I think we can decide whether we want to do this change during the TC39 meeting, and land if so.

We may want to rename [[Conditions]] to [[Assertions]] and generally rename this proposal (!) to "import assertions", but this can be a later PR.

[dandclark]

This change LGTM if we want to rename if to assert. I think we can decide whether we want to do this change during the TC39 meeting, and land if so.

We may want to rename [[Conditions]] to [[Assertions]] and generally rename this proposal (!) to "import assertions", but this can be a later PR.

Sounds good, I'll just leave this un-merged for now.
Separately I created #81 to fix the editorial issue you pointed out.

[xtuc]

As discussed during the July 2020 TC39 meeting, it seems that people are in favor of switching to assert, merging this.

[ljharb]

Should the proposal be renamed as well, to "import assertions"?

[dandclark]

Should the proposal be renamed as well, to "import assertions"?

I think so, and @littledan also pointed out that the [[Conditions]] field should probably also be renamed. I filed #87 and I will make these changes if there are no objections.