bug#20629: 25.0.50; Regression: TAGS broken, can't find anything in C++ files.

[Eli Zaretskii]

> From: Dmitry Gutov <dgutov@yandex.ru>
> Date: Sat, 30 May 2015 21:13:30 +0300
> Cc: 20629@debbugs.gnu.org
> 
> This confirms that we should always disregard implicit tag when the 
> explicit tag is present.

"Disregard" for what purposes?  If all you need is the symbol name,
then yes, you should always use the explicit tag.