https://bugzilla.wikimedia.org/show_bug.cgi?id=51472

Denis Jacquerye <[email protected]> changed:

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                 CC|                            |[email protected]

--- Comment #2 from Denis Jacquerye <[email protected]> ---
The expected behaviour of backspace can be different with different writing
systems.

In Indic scripts, as explained in the bug description, the most common
behaviour is that backspace should erase one characters and delete should erase
a cluster. See
http://publib.boulder.ibm.com/infocenter/hodhelp/v10r0/topic/com.ibm.hod.doc/help/hindi.html#hindispecialkeys
http://www-archive.mozilla.org/projects/ctl/tests/#indiceditoper

For other scripts it might be different, particularly for Latin, Greek and
Cyrillic where, because of the precomposed accented characters, it is expected
that characters and character sequences (base character + combining diacritic)
that represent units will behave the same way, i.e. backspace and delete erase
the base and diacritic, for example the single character à and the two
characters ɛ̀ should be treated the same way.

http://www.unicode.org/reports/tr29/#Grapheme_Cluster_Boundaries talks about
this.

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