[lexcorvus]

Correcting grammar and spelling errors—especially in public—is always a tough call: upon judging that an error is systematic and not a simple typo, do you help the writer avoid the error in perpetuity—even if it embarrasses them a little, and even if you'll probably get downvoted for being pedantic or offtopic? In this case, I've determined the downsides are worth the possibility of sparing the author a lifetime of error. So, without further ado:

    s/it's hosting/its hosting/g

[cwbrandsma]

There is a whole lot of "I'm an asshole" conveyed in that statement of yours.

[lexcorvus]

Everything in my statement is genuine. What's more impolite, saying something, or letting someone continue to make a mistake? Like I said in my comment, it's a tough call.

Implying someone is an asshole is always impolite. Take that as you will.

[nostrademons]

A lot of people know full well the difference between "its" and "it's", but dash off HN comments because they have something contribute but not a lot of time. I've been known to forget whole verbs when writing out my comments, for example. That doesn't mean that they're fated to a lifetime of always getting it wrong: the parent comment you corrected used "it's" correctly once and incorrectly twice, and uses "its" correctly in his comment history.

The other commenters are asking you to please consider carelessness rather incompetence as a motive, and to see the forest for the trees. If everybody corrected grammar in the comments, we'd quickly see the site switch from substantive discussion to useless pedantry. Don't be that guy.

[dontscale]

You don't need to give lexcorvus a hard time. Isn't it evident from his/her personality that he/she has enough of those already?

[mtmail]

The author's email address is in his HN profile (one click away). If you truely wanted to help the author you could have done it in private. I agree with the other users who replied.

[lexcorvus]

I always prefer to correct in private. Most people don't list email addresses in their profiles, so I didn't think to check. Next time I will.

By the way, despite logic, "truly" doesn't contain the substring "true", so "truely" is a misspelling. Your email address, unfortunately, isn't in your profile (and nor could I find it via opencagedata.com), so I hope (though doubt) you'll forgive a public correction.

[PaulHoule]

Funny, but for run of the mill text written by humans you almost always improve things by running

s/it's/its/

[lexcorvus]

Indeed often true; I've noticed the same. In this case, there was a correct use of "it's", so I had to add an extra word to the substitution.

[meepmorp]

It's incredible what a complete ass you are.

[lexcorvus]

Everything I wrote is genuine and polite (perhaps even overly so). What you wrote is distinctly impolite. Is the irony lost on you? Think of that the next time you're tempted to call someone a nasty name.