[PATCH 0/8] Use 'require' even more

[Tom Tromey]

This changes many more tests to use 'require'.

I think the benefits here are two-fold.

First, this is more terse and more importantly, consistent across
tests.  This means it's harder to accidentally early-exit without a
reason.

Second, a test exiting silently seems bad to me, because it requires
investigation into the reason why (which I, for one, never do).  If
every test has to give a reason that it did not run, we could detect a
change in that reason using a comparison script.

There's a bit of discussion of this in:

https://sourceware.org/bugzilla/show_bug.cgi?id=29778

... read that for some background and also perhaps a different view.

Tom