Very strange. I just tried:
hg clone http://hg.assembla.com/CMakeLua CMakeLua
And I had no problems. Maybe there was a temporary outage? I recommend
you try it again. I don't suggest copying/pasting all the files out of
the trac. I'll find a better way to help you out if it comes to that,
but we really need the repository to work so it is important we fix it
if it is broken.
What Mercurial version are you using and what platform are you on? And
how did you install Mercurial? Are you able to access any other
Mercurial repositories? For example, are you able to clone this one?
hg clone http://hg.assembla.com/lua Lua
-Eric
For comparison, do any non-Assembla repos work for you? e.g.
hg clone http://selenic.com/hg mercurial-repo