fix whitespace

Author: youennf

index.bs

@@ -267,7 +267,7 @@ The <dfn method for="SFrameTransform">setEncryptionKey(|key|, |keyID|)</dfn> met
 1. Let |promise| be [=a new promise=].
 2.  [=In parallel=], run the following steps:
     1. Set |key| with its optional |keyID| as key material to use for the SFrame transform algorithm, as defined by the <a href="https://datatracker.ietf.org/doc/draft-omara-sframe/">SFrame specification</a>.
-    2. If setting the key material fails, [=Reject=] |promise| with an {{InvalidModificationError}} error  and abort these steps.
+    2. If setting the key material fails, [=Reject=] |promise| with an {{InvalidModificationError}} error and abort these steps.
     3. [=Resolve=] |promise| with undefined.
 3. Return |promise|.