Fix minor typos (#105)

Author: avandolder

spec.html

@@ -364,7 +364,7 @@ <h1>%Iterator.prototype%.drop ( _limit_ )</h1>
           1. Repeat, while _remaining_ &gt; 0,
             1. Set _remaining_ to _remaining_ - 1.
             1. Let _next_ be ? IteratorStep(_iterated_).
-            1. If _next_ is *false*, return *undeifned*.
+            1. If _next_ is *false*, return *undefined*.
           1. Let _lastValue_ be *undefined*.
           1. Repeat,
             1. Let _next_ be ? IteratorStep(_iterated_, _lastValue_).
@@ -617,7 +617,7 @@ <h1>%AsyncIterator.prototype%.drop ( _limit_ )</h1>
           1. Repeat, while _remaining_ &gt; 0,
             1. Set _remaining_ to _remaining_ - 1.
             1. Let _next_ be ? Await(? IteratorNext(_iterated_)).
-            1. If ? IteratorComplete(_next_) is *true*, return *undeifned*.
+            1. If ? IteratorComplete(_next_) is *true*, return *undefined*.
           1. Let _lastValue_ be *undefined*.
           1. Repeat,
             1. Let _next_ be ? Await(? IteratorNext(_iterated_, _lastValue_)).
@@ -639,7 +639,7 @@ <h1>%AsyncIterator.prototype%.asIndexedPairs ( )</h1>
           1. Let _lastValue_ be *undefined*.
           1. Repeat,
             1. Let _next_ be ? Await(? IteratorNext(_iterated_, _lastValue_)).
-            1. If ? IteratorComplete(_next_ is *true*, return *undefined*).
+            1. If ? IteratorComplete(_next_) is *true*, return *undefined*.
             1. Let _value_ be ? IteratorValue(_next_).
             1. Let _pair_ be ! CreateArrayFromList(&laquo; _index_, _value_ &raquo;).
             1. Set _index_ to _index_ + 1.