docs: add comment explaining wg.Wait

It's a bit trite for now, but it'll do.

1 files changed, 2 insertions, 0 deletions

diff --git a/main.go b/main.go
index feb3dfe..3b46af5 100644
--- a/main.go
+++ b/main.go
@@ -40,6 +40,8 @@ loop:
 	// p-channels (p1, p2, etc.)
 	close(p0)
 
+	// Wait for all of the in-flight player goroutines to
+	// finish. You need this!
 	wg.Wait()
 
 	// If any of these prints out, we know we did something wrong.