[MERGE] Explain revision/range identifiers

[John Arbash Meinel]

John Arbash Meinel has voted tweak.
Status is now: Semi-approved
Comment:
...
  More than two revisions can be specified by using this syntax.

^- I would get rid of this sentence. It is technically true, but no 
command uses it yet.

In its place, I would probably mention that some commands interpret the 
range differently. "log" considers it a closed range (include both 
ends), most people think diff & merge consider it open ended (include 
one end, not the other.)

You might also describe "-c" which is effectively equivalent to "-r 
before:X..X"

For details, see: 
http://bundlebuggy.aaronbentley.com/project/bzr/request/%3C87vdxlxdmg.fsf%40gmail.com%3E
Project: Bazaar