Typespec variants not kept on separate lines

[ehamberg]

(erlfmt @ e81bcb4)

When splitting the variants of an argument to a function typespec over several lines, it seems that erlfmt may leave more than one case in the last line:

--spec encode(#user_creation_token{} | #user_authentication_token{} | #user_password_reset_token{} | #user_email_verification_token{}) -> binary().
+-spec encode(
+    #user_creation_token{} |
+    #user_authentication_token{} |
+    #user_password_reset_token{} | #user_email_verification_token{}
+) ->
+    binary().