Add --line-number option to hg annotate (issue506) Line numbers are separated from the last annotation element with a colon, like with many other commands, e.g. (hg) grep or compiler errors. Idea and tests by FUJIWARA Katsunori.

adding dir/bar
adding foo
dir/bar
foo
adding dir/bar_2
adding foo_2
dir/bar_2
foo_2
adding a
adding c
adding b
adding d
removing a
removing c
recording removal of a as rename to b (100% similar)