Follow the style guide in the style guide (#16466)

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## Summary

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> 4. Hyphenate compound words, e.g., use "platform-specific" not
"platform specific".

Applies to "command line arguments" -> "command-line arguments".

Author: hugovk

STYLE.md

@@ -16,7 +16,7 @@ documentation_.
 1. If a message ends with a single relevant value, precede it with a colon, e.g.,
    `This is the value: value`. If the value is a literal, wrap it in backticks.
 1. Markdown files should be wrapped at 100 characters.
-1. Use a space, not an equals sign, for command line arguments with a value, e.g.
+1. Use a space, not an equals sign, for command-line arguments with a value, e.g.
    `--resolution lowest`, not `--resolution=lowest`.
 
 ## Styling uv