(diff.info.gz) Internationalization

 
 Handling Multibyte and Varying-Width Characters
 -----------------------------------------------
 
    `diff', `diff3' and `sdiff' treat each line of input as a string of
 unibyte characters.  This can mishandle multibyte characters in some
 cases.  For example, when asked to ignore spaces, `diff' does not
 properly ignore a multibyte space character.
 
    Also, `diff' currently assumes that each byte is one column wide,
 and this assumption is incorrect in some locales, e.g., locales that
 use UTF-8 encoding.  This causes problems with the `-y' or
 `--side-by-side' option of `diff'.
 
    These problems need to be fixed without unduly affecting the
 performance of the utilities in unibyte environments.
 
    The IBM GNU/Linux Technology Center Internationalization Team has
 proposed some patches to support internationalized `diff'
 `http://oss.software.ibm.com/developer/opensource/linux/patches/i18n/diffutils-2.7.2-i18n-0.1.patch.gz'.
 Unfortunately, these patches are incomplete and are to an older version
 of `diff', so more work needs to be done in this area.

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(diff.info.gz) Shortcomings

(diff.info.gz) Changing Structure

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