doc: improve style guide text
- Specify that personal pronouns are OK in colloquial documentation rather than just pronouns. Pronouns are OK in all documentation. (For example, "it" is a pronoun and is acceptable in all types of documentation.) Specify "personal pronouns" for clarity.
- more colloquial -> colloquial
- like -> such as
- Remove "mass nouns" as no mass nouns are given as examples. Plural nouns seems to be what was meant, so use that instead.
- Repeat "gender-neutral" to make it clear that it refers to both terms and not merely the first term it appears before.
- Remove "non-comprehensive examples". Examples are, by definition, non-comprehensive. No need to announce that the examples are examples. It is obvious.
Checklist
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documentation is changed or added -
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