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From: Eli Zaretskii <eliz@gnu.org>
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Subject: Re: Towards a cleaner build: viper-ex
Date: Thu, 13 Jun 2019 06:41:04 +0300
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To: Lars Ingebrigtsen <larsi@gnus.org>
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In-reply-to: <m3a7emmltr.fsf_-_@gnus.org> (message from Lars Ingebrigtsen on
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> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Thu, 13 Jun 2019 01:21:36 +0200
> 
> In ex-tag:
> emulation/viper-ex.el:2019:16:Warning: `find-tag' is an obsolete function (as
>     of 25.1); use `xref-find-definitions' instead.
> emulation/viper-ex.el:2020:14:Warning: `find-tag-other-window' is an obsolete
>     function (as of 25.1); use `xref-find-definitions-other-window' instead.
> 
> I thought this was going to be trivial to fix, but:
> 
> 	  (if (string= tag "")
> 	      (find-tag ex-tag t)
> 	    (find-tag-other-window ex-tag))

Time to use the new anti-warning facilities you just introduced?