README: Add (and answer) question about immutableArrayBuffer.transfer() (#5)

Author: gibson042

README.md

@@ -68,10 +68,38 @@ Tracking issues to be added:
 
 ## Q&A
 
-* Should `transferToImmutable` support a `newByteLength` argument?
-* Should trying to write data in an immutable ArrayBuffer via a TypedArray element set throw, even though trying to write out-of-bounds or to a detached ArrayBuffer does not?
-* Should TypedArray write methods (`copyWithin`, `fill`, `reverse`, `set`, etc.) throw when their backing ArrayBuffer is immutable but the targeted range is zero-length? If so, how early or late in the algorithm? The methods currently inspect arguments after ValidateTypedArray.
-* Similarly,
-  * How early or late in SetViewValue against an immutable ArrayBuffer should an exception be thrown? It currently inspects arguments *before* IsViewOutOfBounds.
-  * Likewise for abstract operations such as ArrayBufferCopyAndDetach (which currently checks IsSharedArrayBuffer, then _newLength_, then IsDetachedBuffer).
-  * And also for `Atomics` functions.
+<dl>
+<dt>
+
+Why can't an immutable ArrayBuffer be detached/transferred?
+
+</dt>
+<dd>
+
+Because that would result in observable changes to any TypedArray or DataView backed by it.
+
+</dd>
+<dt>
+
+Should `transferToImmutable` support a `newByteLength` argument?
+
+</dt>
+<dt>
+
+Should trying to write data in an immutable ArrayBuffer via a TypedArray element set throw, even though trying to write out-of-bounds or to a detached ArrayBuffer does not?
+
+</dt>
+<dt>
+
+Should TypedArray write methods (`copyWithin`, `fill`, `reverse`, `set`, etc.) throw when their backing ArrayBuffer is immutable but the targeted range is zero-length? If so, how early or late in the algorithm? The methods currently inspect arguments after ValidateTypedArray.
+
+</dt>
+<dt>
+
+Similarly,
+* How early or late in SetViewValue against an immutable ArrayBuffer should an exception be thrown? It currently inspects arguments *before* IsViewOutOfBounds.
+* Likewise for abstract operations such as ArrayBufferCopyAndDetach (which currently checks IsSharedArrayBuffer, then _newLength_, then IsDetachedBuffer).
+* And also for `Atomics` functions.
+
+</dt>
+<dl>