5.x: wiki "watch" emails come with iso-8859-1 to me even if chosen utf-8 everywhere in settings; other email ok

• Usability
• Regression

[10:28] <xavi> since a few versions ago, I can't get wiki watch emails with a correct encoding for accents, etc.
[10:28] <xavi> smae behavior in many servers (using Tiki 4.x, 5.x... tried with setting utf-8 and iso-8859-1)
[10:29] <xavi> I get most emails all right , email reader (thunderbird, gmail, etc.) can read them properly, but not emails from changes in wiki pages...
[10:30] <xavi> I wonder if this can be some problem with the encoding in some tpl , or that the code for sending emails from changes in wiki pages uses some different method than the rest of email sending... and that other method is not handling charset properly... (just hypothesis)
[10:31] <xavi> asking here first in case someone who already knows the internals of Tiki has some tips...
[10:31] <xavi> to quickly refuse some hypothesis...
[10:32]  * xavi fears looking at the code for this and getting lost in php code , zend code, and other gibberish which he can't understand easily....
[10:41] <xavi> ok, at least I know some more information about the problem (charset for wiki watch emails)
[10:42] <xavi> I double checked in one site, and everywhere is set to use utf-8 as encoding (admin general, admin community, and my own user pref settings), but wiki watch emails come with: "content-type: text/plain; charset=iso-8859-1"
[10:43] <xavi> ok, this deserves a bug report...

This bug has been demonstrated on show2.tiki.org

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