Editorial: Remove trailing whitespace

Author: gibson042

spec/mainadditions.html

@@ -65,7 +65,7 @@ <h1>
         1. Let _excluded_ be *false*.
         1. For each element _e_ of <del>_excludedItems_</del><ins>_excludedKeys_</ins>, do
           1. If SameValue(_e_, _nextKey_) is *true*, then
-            1. Set _excluded_ to *true*.            
+            1. Set _excluded_ to *true*.
         1. If _excluded_ is *false*, then
           1. Let _desc_ be ? <emu-meta effects="user-code">_from_.[[GetOwnProperty]]</emu-meta>(_nextKey_).
           1. If _desc_ is not *undefined* and _desc_.[[Enumerable]] is *true*, then