doc: Remove buggy ICU collation from documentation

We have had multiple reports that point to the
'@colReorder=latn-digit' collation customization being buggy.  We have
reported this to ICU and are waiting for a fix.  In the meantime,
remove references to this from the documentation and replace it by
another reordering example.  Apparently, many users have been picking
up this example specifically from the documentation.

Author: Jehan-Guillaume de Rorthais 
Discussion: https://www.postgresql.org/message-id/flat/153201618542.1404.3611626898935613264%40wrigleys.postgresql.org

diff --git a/doc/src/sgml/charset.sgml b/doc/src/sgml/charset.sgml
index 4b4563c5b9d805b345de9f57778ec5fc11a256c6..2745b4441765485858e26899afa666582c4d431d 100644 (file)
--- a/doc/src/sgml/charset.sgml
+++ b/doc/src/sgml/charset.sgml
@@ -791,11 +791,11 @@ CREATE COLLATION german (provider = libc, locale = 'de_DE');
      
 
      
-      CREATE COLLATION digitslast (provider = icu, locale = 'en-u-kr-latn-digit');
-      CREATE COLLATION digitslast (provider = icu, locale = 'en@colReorder=latn-digit');
+      CREATE COLLATION latinlast (provider = icu, locale = 'en-u-kr-grek-latn');
+      CREATE COLLATION latinlast (provider = icu, locale = 'en@colReorder=grek-latn');
       
        
-        Sort digits after Latin letters.  (The default is digits before letters.)
+        Sort Greek letters before Latin ones.  (The default is Latin before Greek.)
        
       
      
@@ -811,9 +811,9 @@ CREATE COLLATION german (provider = libc, locale = 'de_DE');
       
      
 
-     
-      CREATE COLLATION special (provider = icu, locale = 'en-u-kf-upper-kr-latn-digit');
-      CREATE COLLATION special (provider = icu, locale = 'en@colCaseFirst=upper;colReorder=latn-digit');
+    
+      CREATE COLLATION special (provider = icu, locale = 'en-u-kf-upper-kr-grek-latn');
+      CREATE COLLATION special (provider = icu, locale = 'en@colCaseFirst=upper;colReorder=grek-latn');
       
        
         Combines both of the above options.