Add = and - long ligatures too

demo/client.ts

@@ -1316,7 +1316,9 @@ function ligaturesTest(): void {
     '<-> <--> <---> <----> <=> <==> <===> <====> :: ::: __',
     '<~~ </ </> /> ~~> == != /= ~= <> === !== !=== =/= =!=',
     '<: := *= *+ <* <*> *> <| <|> |> <. <.> .> +* =* =: :>',
-    '(* *) /* */ [| |] {| |} ++ +++ \/ /\ |- -| <!-- <!---'
+    '(* *) /* */ [| |] {| |} ++ +++ \/ /\ |- -| <!-- <!---',
+    '==== ===== ====== ======= ======== =========',
+    '---- ----- ------ ------- -------- ---------'
   ].join('\r\n'));
 }