Re-order disable_on_error in tab-complete.

By convention, the tab-complete subscription parameters are listed in the
COMPLETE_WITH lists in alphabetical order, but when the "disable_on_error"
parameter was introduced this was not done.

This patch just tidies that up.

Reported-by: Peter Smith
Author: Peter Smith
Reviewed-by: Euler Taveira, Takamichi Osumi
Backpatch-through: 15, where it was introduced
Discussion: https://postgr.es/m/CAHut+PucvKZgg_eJzUW--iL6DXHg1Jwj6F09tQziE3kUF67uLg@mail.gmail.com

src/bin/psql/tab-complete.c

@@ -1873,7 +1873,7 @@ psql_completion(const char *text, int start, int end)
 		COMPLETE_WITH("(", "PUBLICATION");
 	/* ALTER SUBSCRIPTION <name> SET ( */
 	else if (HeadMatches("ALTER", "SUBSCRIPTION", MatchAny) && TailMatches("SET", "("))
-		COMPLETE_WITH("binary", "slot_name", "streaming", "synchronous_commit", "disable_on_error");
+		COMPLETE_WITH("binary", "disable_on_error", "slot_name", "streaming", "synchronous_commit");
 	/* ALTER SUBSCRIPTION <name> SKIP ( */
 	else if (HeadMatches("ALTER", "SUBSCRIPTION", MatchAny) && TailMatches("SKIP", "("))
 		COMPLETE_WITH("lsn");
@@ -3152,8 +3152,8 @@ psql_completion(const char *text, int start, int end)
 	/* Complete "CREATE SUBSCRIPTION <name> ...  WITH ( <opt>" */
 	else if (HeadMatches("CREATE", "SUBSCRIPTION") && TailMatches("WITH", "("))
 		COMPLETE_WITH("binary", "connect", "copy_data", "create_slot",
-					  "enabled", "slot_name", "streaming",
-					  "synchronous_commit", "two_phase", "disable_on_error");
+					  "disable_on_error", "enabled", "slot_name", "streaming",
+					  "synchronous_commit", "two_phase");
 
 /* CREATE TRIGGER --- is allowed inside CREATE SCHEMA, so use TailMatches */