Use personal pronoun consistently

[agryman]

A minor nit: In the following text from "Introduction", you switch from "I" to "we".

With the goal of teaching through computation, it means I need to also choose a programming language. There are many programming languages well suited to multibody dynamics computation, but we select [Python](http://www.python.org/) for several reasons:

The book is singly-authored by you, so stick to "I".

If you agree with this choice, I'll go ahead and make this change going forward, along with other minor typos, and submit a PR.

[moorepants]

Yes, that one should be "I". There may be places were I do want it to be we, but I'd have to take a full pass again to see. I'll review a PR with the changes if you make it. I think I may have jumped between I and we a fair amount though :(

[agryman]

Jason, OK, I'm proofreading from the start. I'll submit several smallish PRs.

…

-- Arthur

On Sat, Jun 25, 2022 at 2:59 AM Jason K. Moore ***@***.***> wrote: Yes, that one should be "I". There may be places were I do want it to be we, but I'd have to take a full pass again to see. I'll review a PR with the changes if you make it. I think I may have jumped between I and we a fair amount though :( — Reply to this email directly, view it on GitHub <#89 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ACAHS2DLNLRKF5AZGYKISBLVQ2U33ANCNFSM5ZZBGKHQ> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[agryman]

I'll fix this in my next PR.