Hi Pedro,

> It looks good to me.  A few comments on minor details follow.
> 
> How about naming the testcase list-thread-groups-no-inferior.exp
> (no "mi-") so that it sits side-by-side with
> list-thread-groups-available.exp?

Good idea. Done.

> We're missing an intro comment in the .exp file mentioning what the
> testcase is about, otherwise it's not clear why we have two separate
> testcases for seemingly the same thing.

Also added. Let me know if you think it's not enough information,
and I will add more. That's all I could think of from my perspective,
though.

> A couple microscopic nits more:
> 
> > +gdb_test_multiple $test $test {
> > +    -re ".*\}" {
> 
> Leading ".*" is not necessary, it's implied.

Thanks - fixed!

> 
> > +mi_gdb_test "-data-evaluate-expression 1" \
> > +            ".*\\^done,value=\"1\"" \
> > +            "check GDB is still alive"
> > +
> 
> "check" and "test" in test messages is one of my pet peeves.
> OK, I'm really exaggerating.  :-)  The point is that all
> tests are checking something, making it redundant.
> "GDB is still alive" or even "GDB is alive" says the same.

True, and I like it when it's shorter-with-no-loss. Fixed as well.

Attached is the version I just pushed. I'll make further adjustments
if you see something I missed or the description isn't complete for you.

Thanks again!
-- 
Joel