Revert "Pretty-print the "Trying a mirror" message"

This reverts commit af8e3b5aeacdb10a412560e131d631ba733a8346.

Sorry for the noise.

Signed-off-by: Jack Nagel <jacknagel@gmail.com>

Library/Homebrew/formula.rb

@@ -563,8 +563,7 @@ private
       fetched = downloader.fetch
     rescue DownloadError => e
       raise e if mirror_list.empty?
-      opoo e.message
-      oh1 "Trying a mirror"
+      opoo "#{e.message}\nTrying a mirror."
       url, specs = mirror_list.shift.values_at :url, :specs
       downloader = download_strategy.new url, name, version, specs
       retry