Now that Unicode 12.1 has been announced[0], update the character
width tables to the new version.

[0] http://blog.unicode.org/2019/05/unicode-12-1-en.htmlSigned-off-by: NBeat Bolli <dev+git@drbeat.li>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Now that Unicode 12 has been announced[0], update the character
width tables to the new version.

[0] http://blog.unicode.org/2019/03/announcing-unicode-standard-version-120.htmlSigned-off-by: NBeat Bolli <dev+git@drbeat.li>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Now that Unicode 11 has been announced[0], update the character
width tables to the new version.

[0] http://blog.unicode.org/2018/06/announcing-unicode-standard-version-110.htmlSigned-off-by: NBeat Bolli <dev+git@drbeat.li>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

This is more consistent with the project style. The majority of Git's
source files use dashes in preference to underscores in their file names.

Also adjust contrib/update-unicode as well.
Signed-off-by: NStefan Beller <sbeller@google.com>

Now that Unicode 10 has been announced[0], update the character
width tables to the new version.

[0] http://blog.unicode.org/2017/06/announcing-unicode-standard-version-100.htmlSigned-off-by: NBeat Bolli <dev+git@drbeat.li>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Rerunning update-unicode.sh that we fixed in the previous commits
produces these new tables.
Signed-off-by: NBeat Bolli <dev+git@drbeat.li>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Unicode Version 7.0 was released yesterday.
Run ./update_unicode.sh to update the zero_width table.
Note: the double_width is unchanged.
Signed-off-by: NTorsten Bögershausen <tboegi@web.de>
Reviewed-by: NJonathan Nieder <jrnieder@gmail.com>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

The function git_wcwidth() returns for a given unicode code point the
width on the display:

 -1 for control characters,
  0 for combining or other non-visible code points
  1 for e.g. ASCII
  2 for double-width code points.

This table had been originally been extracted for one Unicode
version, probably 3.2.

We now use two tables these days, one for zero-width and another for
double-width.  Make it easier to update these tables to a later
version of Unicode by factoring out the table from utf8.c into
unicode_width.h and add the script update_unicode.sh to update the
table based on the latest Unicode specification files.

Thanks to Peter Krefting <peter@softwolves.pp.se> and Kevin Bracey
<kevin@bracey.fi> for helping with their Unicode knowledge.
Signed-off-by: NTorsten Bögershausen <tboegi@web.de>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>