Fix indentation (w3c-fedid#524)

spec/index.bs

@@ -2007,20 +2007,20 @@ The [=remote end steps=] are:
 The [=remote end steps=] are:
 
 1. If |parameters| is not a JSON [[ECMASCRIPT#sec-json-object|Object]], return a
-   [=error|WebDriver error=] with [=error code=] [=invalid argument=].
+    [=error|WebDriver error=] with [=error code=] [=invalid argument=].
 
 1. Let |dialogButton| be the result of [=getting a property=] named
-   `"dialogButton"` from |parameters|.
+    `"dialogButton"` from |parameters|.
 
 1. If |dialogButton| is not a string that is "`ConfirmIdpLoginContinue`", return
-   a [=error|WebDriver error=] with [=error code=] [=invalid argument=].
+    a [=error|WebDriver error=] with [=error code=] [=invalid argument=].
 
 1. If no FedCM dialog is currently open or the dialog is not a [=confirm IDP
-   login dialog=], return a [=error|WebDriver error=] with [=error code=] [=no
-   such alert=].
+    login dialog=], return a [=error|WebDriver error=] with [=error code=] [=no
+    such alert=].
 
 1. Act as if the user had clicked the "continue" button in the [=confirm IDP
-   login dialog=] and initiate the login flow.
+    login dialog=] and initiate the login flow.
 
 1. Return [=success=] with data `null`.