"_maxByteLength_ is present and not ~empty~": expand the elision

This one is debatable.
I mostly did it for my convenience,
but I think PR tc39#2877 also preferred some similar expansions.

spec.html

@@ -42609,7 +42609,7 @@ <h1>
         </dl>
         <emu-alg>
           1. Let _slots_ be « [[ArrayBufferData]], [[ArrayBufferByteLength]], [[ArrayBufferDetachKey]] ».
-          1. If _maxByteLength_ is present and not ~empty~, let _allocatingResizableBuffer_ be *true*; otherwise let _allocatingResizableBuffer_ be *false*.
+          1. If _maxByteLength_ is present and _maxByteLength_ is not ~empty~, let _allocatingResizableBuffer_ be *true*; otherwise let _allocatingResizableBuffer_ be *false*.
           1. If _allocatingResizableBuffer_ is *true*, then
             1. If _byteLength_ > _maxByteLength_, throw a *RangeError* exception.
             1. Append [[ArrayBufferMaxByteLength]] to _slots_.
@@ -43227,7 +43227,7 @@ <h1>
         </dl>
         <emu-alg>
           1. Let _slots_ be « [[ArrayBufferData]] ».
-          1. If _maxByteLength_ is present and not ~empty~, let _allocatingGrowableBuffer_ be *true*; otherwise let _allocatingGrowableBuffer_ be *false*.
+          1. If _maxByteLength_ is present and _maxByteLength_ is not ~empty~, let _allocatingGrowableBuffer_ be *true*; otherwise let _allocatingGrowableBuffer_ be *false*.
           1. If _allocatingGrowableBuffer_ is *true*, then
             1. If _byteLength_ > _maxByteLength_, throw a *RangeError* exception.
             1. Append [[ArrayBufferByteLengthData]] and [[ArrayBufferMaxByteLength]] to _slots_.