revset: added lazyset implementation to branch revset
Performance Benchmarking:
$ time hg log -l1 -qr "branch(default)"
0:
9117c6561b0b
real 0m3.366s
user 0m3.217s
sys 0m0.095s
$ time ./hg log -l1 -qr "branch(default)"
0:
9117c6561b0b
real 0m0.389s
user 0m0.199s
sys 0m0.061s
run-tests: fix typo and print out failing line
Instead of stripping the newline and printing the line, only the newline was
printed.
The output on buildbot will make more sense now.