naughty: convert <br> tag to \n

Signed-off-by: Julien Danjou <julien@danjou.info>

lib/naughty.lua.in

@@ -326,7 +326,7 @@ function notify(args)
     local textbox = capi.widget({ type = "textbox", align = "flex" })
     textbox:buttons(util.table.join(button({ }, 1, run), button({ }, 3, die)))
     layout.margins[textbox] = { right = margin, left = margin, bottom = margin, top = margin }
-    textbox.text = string.format('<span font_desc="%s"><b>%s</b>%s</span>', font, title, text)
+    textbox.text = string.format('<span font_desc="%s"><b>%s</b>%s</span>', font, title, text:gsub("<br.->", "\n"))
     textbox.valign = "middle"
 
     -- create iconbox