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Re: case conversion by replace-match

From: Richard Stallman
Subject: Re: case conversion by replace-match
Date: Sat, 17 May 2003 09:50:32 -0400

    However, when foo is run in a buffer containing the string "=FC",
    this string will be replaced with an uppercase umlaut-U.

This is a feature: when replacing an uppercase word, replace-match
converts the replacement to uppercase.  If you don't want that feature,
pass t for the second argument to replace-match.

    PS In mime-encoded mails "=FC" represents a lowercase umlaut-u.

replace-match only cares that the letters are upper case.
It does not know you intend them to stand for something else.

By the way, perhaps you want to use mail-unquote-printable-region
to do this decoding.

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