app: fix typos

Signed-off-by: Elias Naur <mail@eliasnaur.com>

app/os.go

@@ -176,7 +176,7 @@ type context interface {
 // basicDriver is the subset of [driver] that may be called even after
 // a window is destroyed.
 type basicDriver interface {
-	// Event blocks until an even is available and returns it.
+	// Event blocks until an event is available and returns it.
 	Event() event.Event
 	// Invalidate requests a FrameEvent.
 	Invalidate()

app/window.go

@@ -93,7 +93,7 @@ type Window struct {
 	// coalesced tracks the most recent events waiting to be delivered
 	// to the client.
 	coalesced eventSummary
-	// frame tracks the most recently frame event.
+	// frame tracks the most recent frame event.
 	lastFrame struct {
 		sync bool
 		size image.Point