Normalize paths when testing for venv activation?

[kpinc]

Hello,

Looking at ansiblelint.main.path_inject() I see that it does not normalize the paths before comparing them. I think it should, to work in all cases. I.e. I see that the paths set in #1885 (comment) contain '//', and so will not be properly compared. (I've no idea if this matters to issue #1885.)

As long as i'm writing, I suggest main.activate_venv() in place of main.path_inject() because it says both what is happening and why.