GNU bug report logs - #30574
Support different charsets

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Message-ID: <1519316385.2225.34.camel@HIDDEN>
Subject: Support different charsets
From: Victor Porton <porton@HIDDEN>
To: bug-diffutils@HIDDEN
Date: Thu, 22 Feb 2018 18:19:45 +0200
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1. We should be able to do `diff` even for source and destination
having different encodings and/or charsets.

Add option for source encoding and destination encoding.

2. The conversion to common encoding should be even with the option to
not fail on wrong or unconvertible characters (like //IGNORE in GNU
iconv), that is replacing unknown characters with a placeholder
character. This is useful to compare wrongly encoded files.

3. More generally we can add filter for every compared file first to
pass through the filter. Item 1 can be implemented by passing `iconv`
or `recode` command as such a filter.