Specifying rev ranges [was Re: hg log -r]

[Alexis S. L. Carvalho]

Thus spake Bryan O'Sullivan:
> I thus suggest that we make the colon character ":" illegal in tags, and
> use it for range naming, just as it's used in Python.  We'll thus have
> no problems with ambiguity.

Also, notice that ":" is already invalid for local tags - python's
ConfigParser allows the use of "=" or ":" to separate keys from values,
so something like

[tags]
foo:bar = 9a80418646dd5f30d3459bf87d3e10e27dfad4af

will be interpreted as key "foo" with value 
"bar = 9a80418646dd5f30d3459bf87d3e10e27dfad4af"

Alexis