Description:
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some pages of the  german documention show strange characters for umlauts

it seems they got encoded latin1..utf8 twice

Reproduce code:
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look at the german documentation:

http://www.php.net/manual/de/pdo.installation.php

when switching the browser manually to latin-1 you can see for example:   

k?�¶nnen

it shows 4 "strange" bytes instead of the expected 2

Expected result:
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example from the URL "PHP 5.1 und h?her auf Unix-Systemen"

Actual result:
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example from the URL "PHP 5.1 und höher auf Unix-Systemen"