Update WorkflowRun.Get Doc String (#1346)

* Update internal_workflow_client.go

Doc string improvement

* Update internal_workflow_client.go

Suggested change

* Formatting

internal/internal_workflow_client.go

@@ -121,8 +121,10 @@ type (
 		GetRunID() string
 
 		// Get will fill the workflow execution result to valuePtr, if workflow
-		// execution is a success, or return corresponding error. This is a blocking
-		// API.
+		// execution is a success, or return corresponding error. If valuePtr is
+		// nil, valuePtr will be ignored and only the corresponding error of the 
+		// workflow will be returned (nil on workflow execution success). 
+		// This is a blocking API.
 		//
 		// This call will follow execution runs to the latest result for this run
 		// instead of strictly returning this run's result. This means that if the
@@ -138,8 +140,10 @@ type (
 		Get(ctx context.Context, valuePtr interface{}) error
 
 		// GetWithOptions will fill the workflow execution result to valuePtr, if
-		// workflow execution is a success, or return corresponding error. This is a
-		// blocking API.
+		// workflow execution is a success, or return corresponding error. If
+		// valuePtr is nil, valuePtr will be ignored and only the corresponding
+		// error of the workflow will be returned (nil on workflow execution success). 
+		// This is a blocking API.
 		//
 		// Note, values should not be reused for extraction here because merging on
 		// top of existing values may result in unexpected behavior similar to