Make minor grammar changes in doctest.rst

[mvoitko]

No description provided.

[Zac-HD]

"adding commas" is not "fixing typos", and while we welcome Hacktoberfest contributions this is not actually helpful.

[The-Compiler]

@Zac-HD This seems unnecessarily dismissive, IMHO. While Hacktoberfest-spam is a problem, I view this PR as a net-positive.

Also, it's coming from a GitHub account which exists for a long time already, so this doesn't seem like someone just trying to game the system for getting a t-shirt. It really doesn't sit well with me to outright dismiss well-intended contributions just because they're a minor change and it happens to be October. This is how you drive new contributors away.

Note that "typos" vs. "grammar changes" is a subtle distinction, even more so for someone who (presumably) isn't a native English speaker.

Taking the freedom to reopen and merge this.

[Zac-HD]

Apologies @mvoitko, I guess I'm a little over-sensitised 😕

(and thanks for catching it, @The-Compiler)

[mvoitko]

@The-Compiler @Zac-HD Thanks a lot. I was searching for a starting point to contribute to pytest since I have been using it for a very long time and notices these very minor grammar issues. (I am not a native English speaker) I would appreciate it if you could suggest a good first PR issue in pytest.

[Zac-HD]

Checking issues labelled easy, #3141 might be good 🙂

[The-Compiler]

Thank you!