Update emacs-snapshot source to ppa:ubuntu-elisp/ppa.

[gracjan]

No description provided.

[gracjan]

And we need fix for xref so that this compiles. @z0rch is working on this in #465.

[gracjan]

Hmm, for Emacs25:

Running 3 tests (2015-02-26 16:01:25+0000)
Debugger entered: ((cl-assertion-failed (<= start end) nil))
cl--assertion-failed((<= start end))
haskell-indent-in-comment(38 13)

This test is expected to fail due to cl--assertion-failed, but that exception should be caught by ert. It should not trigger debugger.

How to make ert catch cl-assert as it used to?

[maximbaz]

@gracjan, yesterday I ran make EMACS=emacs-snapshot check on my branch in #465 (z0rch:459-find-tag-marker-ring-is-obsolete), and I got checks passed!.

I can have another look later today, perhaps it is the very recent snapshot that is failing.

[maximbaz]

Ah, no, perhaps more realistic idea is that my branch in #465 is based on earlier version of master rather than your branch here. Anyway, I'll have a look.

[gracjan]

Internets are silent why cl-assert causes 'Debugger entered' even in batch mode. ERT should be able to catch it just like it did in Emacs 24.

[gracjan]

@purcell?

@z0rch: thanks for help! Works now!

[gracjan]

Now is much better, kludges removed.

[purcell]

All looks good to me. Thanks guys.