Add at least one example to the lessecho man page

[jidanni]

Add at least one example to the lessecho man page.
There may be examples, but they aren't on the man page itself.

$ lessecho abc
abc

OK, but that is the same as

$ echo abc
abc

so please add a different example.

[gwsw]

lessecho isn't intended to be used by people, only by less itself. I'm not sure it even needs a man page, but I don't think the man page needs instructions for use by humans.