improve examples (#778)

examples/client-play-format-mjpeg/main.go

@@ -13,10 +13,10 @@ import (
 )
 
 // This example shows how to
-// 1. connect to a RTSP server
-// 2. check if there's a M-JPEG stream
-// 3. get JPEG images of that format
-// 4. decode JPEG images into RGBA frames
+// 1. connect to a RTSP server.
+// 2. check if there's a M-JPEG stream.
+// 3. get JPEG images of that format.
+// 4. decode JPEG images into RGBA frames.
 
 func main() {
 	c := gortsplib.Client{}