Tab-complete CREATE DATABASE ... LOCALE.

Author: Ian Lawrence Barwick <barwick@gmail.com>
Discussion: https://postgr.es/m/CAB8KJ%3Dh0XO2CB4QbLBc1Tm9Bg5wzSGQtT-eunaCmrghJp4nqdA%40mail.gmail.com

src/bin/psql/tab-complete.c

@@ -2429,7 +2429,7 @@ psql_completion(const char *text, int start, int end)
 		COMPLETE_WITH("OWNER", "TEMPLATE", "ENCODING", "TABLESPACE",
 					  "IS_TEMPLATE",
 					  "ALLOW_CONNECTIONS", "CONNECTION LIMIT",
-					  "LC_COLLATE", "LC_CTYPE");
+					  "LC_COLLATE", "LC_CTYPE", "LOCALE");
 
 	else if (Matches("CREATE", "DATABASE", MatchAny, "TEMPLATE"))
 		COMPLETE_WITH_QUERY(Query_for_list_of_template_databases);