datastore: tiny fix, remove repeating word

Change-Id: I72bbe6ffa1f62246549c09dc212c0fded55114f2
Reviewed-on: https://code-review.googlesource.com/c/gocloud/+/53190
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Cody Oss <codyoss@google.com>
diff --git a/datastore/load.go b/datastore/load.go
index 8981044..086b6b6 100644
--- a/datastore/load.go
+++ b/datastore/load.go
@@ -432,7 +432,7 @@
 func loadEntity(dst interface{}, ent *Entity) error {
 	if pls, ok := dst.(PropertyLoadSaver); ok {
 		// Load both key and properties. Try to load as much as possible, even
-		// if an error occurs during loading loading either the key or the
+		// if an error occurs during loading either the key or the
 		// properties.
 		var keyLoadErr error
 		if e, ok := dst.(KeyLoader); ok {