I will leave this to 2.50.1

Just one nit:

+  /* Unicode 9.0 additions */
+  G_UNICODE_SCRIPT_OSAGE,                  /* Osge */
+  G_UNICODE_SCRIPT_NEWA,                   /* Newa */
+  G_UNICODE_SCRIPT_BHAIKSUKI,              /* Bhks */
+  G_UNICODE_SCRIPT_MARCHEN,                /* Marc */
+  G_UNICODE_SCRIPT_TANGUT,                 /* Tang */
+  G_UNICODE_SCRIPT_ADLAM                   /* Adlm */

For previous unicode updates, the newly added scripts were ordered alphabetically (within the added group, of course), so they should be, here, too.

@chpe: Updated the branch

commit 1ff79690fbd57a1029918ff37b7890b1096854b6
Author: Rico Tzschichholz <ricotz@ubuntu.com>
Date:   Sat Sep 17 15:57:21 2016 +0200

    unicode: Update test data files for unicode 9.0.0
    
    https://bugzilla.gnome.org/show_bug.cgi?id=771591

commit ba18667bb467ef4734f5d8a9bbeabcad39be4ecc
Author: Rico Tzschichholz <ricotz@ubuntu.com>
Date:   Sat Sep 17 15:57:10 2016 +0200

    unicode: Update to unicode 9.0.0
    
    https://bugzilla.gnome.org/show_bug.cgi?id=771591

commit c7f46997351805e436803ac74a49a88aa1602579
Author: Rico Tzschichholz <ricotz@ubuntu.com>
Date:   Sat Sep 17 15:55:48 2016 +0200

    unicode: Update break_mappings
    
    This will be required for the update to unicode 9.0.0.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=771591

The unicode test fails now on master. That's because the new scripts were reordered in the enum declaration, but are now out of order in the iso1594_tags table in guniprop.c which means that g_unicode_script_to/from_iso15924 will return incorrect values for those new scripts.

Created attachment 336858 [details] [review]
unicode: Fix ordering in iso15924_tags to match GUnicodeScript enum

I am pretty sure I updated them too, I guess a "git add ..." fail :(

Review of attachment 336858 [details] [review]:

if it fixes the tests, please push it

Attachment 336858 [details] pushed as 0d1eecd - unicode: Fix ordering in iso15924_tags to match GUnicodeScript enum