[css-env-1] use standardized spelling

[jonathantneal]

There were just two spelling issues I noticed when reviewing the env() spec again last night. Thanks for writing this up, by the way! 😄

Also, I see you’ve merely used a “less common spelling”, tho it may not be used in any other specs? https://www.merriam-webster.com/dictionary/tho

[tabatkins]

"tho" and "thru" are becoming commonplace words, and I actively advocate for their usage. They do show up in other specs, tho @fantasai tends to rewrite them if she edits the text. ^_^

[tabatkins]

(and I'll note that MW says that they appear in "some technical journals", which is close enough to a description of the CSS specs ^_^)

[AmeliaBR]

I would strongly argue for merging this PR.

For English language learners, and anyone else with reading difficulties, non-standard spelling is an unnecessary extra hurdle.

[tabatkins]

If and when this draft gets officially accepted, we can think about it. For now, it's a valid spelling and the way my fingers spell it by default. I'm keeping it.

[svgeesus]

this isn't really the appropriate venue for pushing your ideas on the future evolution of the English language.

[tabatkins]

~ it's an unofficial draft ~