Minor wording changes

sycl/doc/extensions/experimental/sycl_ext_oneapi_graph.asciidoc

@@ -1636,9 +1636,10 @@ namespace ext::oneapi::experimental {
 ----
 
 Dynamic events represent SYCL events from outside of a given `command_graph`
-(either obtained from normal SYCL operations or from another `command_graph`)
-that nodes in that graph may depend on. The `dynamic_event` object enables these
-dependent events to be updated between graph executions.
+which nodes in that graph may depend on. These events are either obtained from
+normal SYCL operations or from another `command_graph` via `get_event()`. The
+`dynamic_event` object enables these dependent events to be updated between
+graph executions.
 
 Dynamic events can be used to add dependencies to a graph node in the same way
 that regular SYCL events can, by passing them as parameters to
@@ -1659,8 +1660,8 @@ Graph.add([&](handler& CGH){
 });
 ----
 Dynamic events created with an event from a `command_graph` cannot then be
-associated with other nodes in that same graph as this would change the shape of
-the graph. Attempting to call `handler::depends_on()` with such a
+associated with other nodes in that same graph as this could be used change the
+topology of the graph. Attempting to call `handler::depends_on()` with such a
 `dynamic_event` in that situation will result in an error.
 
 Dynamic events can be created with no event but must be updated with a valid
@@ -1709,6 +1710,12 @@ Parameters:
 
 * `syclEvent` - The new SYCL event to update this `dynamic_event` with.
 
+Exceptions:
+
+* Throws synchronously with error code `invalid` if `syclEvent` is an event
+obtained from a queue submission which was recorded to the same graph any of the
+`node`s associated with this `dynamic_event` are from.
+
 
 |===