fix typos in docs and comments

[jameslamb]

I've been trying to get more familiar with hamilton, and looking for small ways to contribute as I do. Tonight, I tried searching for typos using aspell and found a few. This PR proposes fixing them.

Additions

N/A

Removals

N/A

Changes

• fixes miscellaneous typos

Testing

N/A

Screenshots

N/A

Notes

N/A

Todos

N/A

Checklist

• PR has an informative and human-readable title
• Changes are limited to a single goal (no scope creep)
• Code can be automatically merged (no conflicts)
• Code follows the standards laid out in the TODO link to standards
• Passes all existing automated tests
• Any change in functionality is tested
• New functions are documented (with a description, list of inputs, and expected output)
• Placeholder code is flagged / future todos are captured in comments
• Project documentation has been updated (including the "Unreleased" section of the CHANGELOG)
• Reviewers requested with the Reviewers tool ➡️

Testing checklist

Python

• python 3.6
• python 3.7

[elijahbenizzy]

@jameslamb thank you! Appreciate the attention to detail :) FYI -- have you joined the discord? https://discord.gg/wCqxqBqn73. Still working to foster a community (we've got some good contributors here but not much action there yet) but its a quick way to ask questions/have community input.

[jameslamb]

have you joined the discord?

I have! @skrawcz invited me a few days ago 😁