The start and stop examples are pretty much identical, so it doesn't make sense to use up the space of two examples in the limited length of a tldr page (especially for such a complex command as docker).
In the slot left by combining the two entries, a new one is added mentioning how to launch a container from an image. Placing this example before the start/stop commands (and naming the parameter "container_name" consistently trhoughout the page) also makes the sequence more logical, by first explaining how containers are instantiated, and only then mentioning how they are managed.